And other critics?As I said in the Tweet section, some of the critics are tweeting some positive things about it.
And other critics?
The way you said it, I thought there was more reactions.I have no idea, I've only seen a few. No doubt too early to tell.

Yeah, it hasn't been that long.Civil War, TFA, Fury Road...

True.Civil War, TFA, Fury Road...
I mean as Darth said these premiers/first press screenings are usually always positive. NOTE: I'm not hating on the movie or anything but a bunch of people saying they liked it doesn't sway me either way on the movie.
Here's something about the first reactions to AoU which has kinda a mixed reception among us fanboys
http://collider.com/avengers-2-age-of-ultron-reviews/
Kimmel Clips on YT:
[YT]bfz2zzDiShI[/YT]
[YT]93Qo6syOeIk[/YT]

Yeah I didn't see concept art for that?
Exactly.Dat Donny yen swag