I'm sorry you're disappointed WallCrawler

I'll admit for the first minute I was a little confused on how I felt because of how similar, mechanically, it is to the Beenox games. But, to be honest--those games had good ideas. They really tried. They were, sadly, restricted by time and money and those good ideas were executed poorly. Insomniac has the chance to make those ideas great, and it seems like they have. But, yes, the familiarity is a bit unsettling at first. It isn't as innovative as I (and I'm assuming you) would've liked, but for me: fun > new.
But it also sounds like your expectations were a lil too great. The fact that his web zip range is too far for you seems a bit silly, no? That's a nitpick and a half. I can understand where you're coming from (I actually thought the same too) but the fact that it's #2 on a 3 point list of why you're so upset with this game is a bit much perhaps? Idk, maybe just me.
And as far as the swinging goes--this has incredible sense of weight and physics. I think you're being blinded by disappointment. If you watch the swinging section again, Spidey really has weight. He feels heavy and THERE. There's a great sense of physics on his body. No speed, though, I agree. But there's a lot that could explain that and I'm not going to speculate (because I don't want to get any hopes up--mine, yours, or otherwise) but until we see some basic, no-holds-barred, free-roam gameplay--I think it's too early to tell. Plus, the guy playing cancels out more than half the swings with the web-zip ability, so we don't have a perfect sense for the swinging yet, anyway.
But all-in-all, you have to remember: This is a scripted demo to give you an idea of all the core mechanics of the game. You have the stealth section, the combat section, the web-swinging section, the QTE section, the large-scale cinematic moments, the story moments--all of it, and how it how blends together to make these large-scale, movie moments. It's not a mirror for the whole game (at least i hope not), it's one continuous moment that showcases numerous elements together and that's all. Great for the average gamer they're trying to reel in, but perhaps a bit underwhelming for those of us who just want to web-swing at mach 5
It'll be okay, WallCrawler. Disappointment sucks big time, but I think once you see some more of this game, you'll warm up to it. I think the initial shock of it not being something MIND-BLOWING and NEVER BEFORE SEEN is sitting pretty heavy on you. Head up man