Man i so cant wait for peter casting to be official. So all the endless  debates on this or that pick can be over. Then we can go to will this  guy be a good peter if its someone no one mentioned. Or is one of the  more favored guys. I do hope casting is revealed monday or tuesday.  Cause if its not man oh man i said it before this board is going to be a  mad house of crazy rumors/pranks on Wednesday. Please marvel reveal the  pick already. 
Now for the whole young parker deal we still yet  to know officially in story how young/what they are going to do with  peter. Yes they may say they want a teen but it be no different then  many films and shows do with casting 18-25 to play 15-18 yr old  characters. Yes it would be cool to see an actual teenage play the role.  But will the kid want to sign long term deals and would he grow  more/grow differently then he already is. Then on top of what if they  want to go to school and if they are under 18 labor laws on filming at  all that. That is why going 20-24 isnt really that bad. 
We by  past all the labor laws issues, they could be done with collage or not  attending collage cause of doing tv/film instead. They are done growing  and we know how they look. And like many have said there is lots of  younger folks who look way older than they are and the same with older  folks looking munch younger then they are. 
So like i said in the  discussion threads if logan/dylan were the pick. With them being 23  turning 24 this yr isnt that bad. makeup, glasses, cloths and the way  they move and act they could fudge there age easy and still be fairly  easy to think they are a teen.
So if phase 3 of the mcu will be  taking peter from 15-19 yrs old. They could still pull that off. I think  as long as they dont age much in the next 5-6 yrs. And i think both got  the youthful looks in them to stay young looking for awhile. 
Then  if there deal is for a start of 6 pictures, from civil war, 3 solo  films, and the two infinity wars films. They would be working pretty  much fully from this yr 2015-2019 filming all 6 of these films. And i  pointed out by the time all 6 of these films are filming or are  completed they would only be turning 28/29 yrs old. Which is right  around the ages tobey and andrew started doing 1st of there films. 
So  if we break doing the ages they are between 2015-2019 phase 3  filming/release window we get this: 2015-23/24, 2016- 24/25, 2017-25/26,  2018-26/27, 2019- 28/29. They would be still under 30 yrs old before  phase 3 ends, and still be a good 10-15 yrs younger then all the other  bigger guns of the mcu heroes. So they could still play with the whole  younger peter/spidey vs the avengers angle. Plus said guy if he was  logan/dylan age or even 20-23 right now would still be young enough to  probably sign for another 3-4 films and go through phase 4 before they  are even 35-38 yrs old. 
And what i think most keep forgetting is  that the mcu films are set in real time they are happening in the years  they are released in. Unless specified like cap 1, agent carter,  etc...... So even if they wanted to do teen peter if he is 15 yrs old in  2016 for civil war By 2019/2020 peter as the character would be hitting  18-19 yrs old and would have to be graduating hs by then. And with that  we would only likely get civil war, solo 1, solo 2 (if released in  2019) we only see spidey as a teen for civil, infinity war, and two solo  films. Even if they did cast a teen at 15-18 yrs old no way they could  stretch him in hs any longer then 2 solos and infinity wars and civil  war. 
So i still dont see why logan or dylan would be out any  more then any other 20 something actor. Cause once we get past teen  spidey in phase 3. For all we know phase 4 films that spidey shows up  could be set a few yrs later and we hit a peter at 25-28 yrs old which  is the age range he is in the comics of present and a 28-early 30s  logan/dylan could still easily play adult peter with ease. Heck didnt  someone mention in one of the threads that rdj tony is 5 years younger  then robert is in real life. So once we have an adult peter age is not  an issue.