Eh, TASM was met with a mixed reaction right from the get go and the fact that TASM felted chopped and horribly pieced together confirms the rumor claiming that Sony executives weren't happy with Webb's final draft of the film.
Thus far, TDKR has been receiving glowing reviews from the LA and NY screenings (most of them stating that TDKR surpasses TDK, and that its Nolan's best work to date). I think at this point it's safe to assume that Nolan has topped himself yet again.
I highly doubt it. Better than
Begins could easily be the case, but I don't see it surpassing
The Dark Knight at least in terms of RT score. Just doubtful in my opinion. You're completely wrong about those other movies too. Most early screenings get glowing reviews, even when the product downright sucks (I even remember
Spider-Man 3 and
X-Men The Last Stand got glowing early reviews). A lot of it's because they'll give those reviewers VIP treatment, and in reality they'll end up skewing their own reviews as a result. Plus, most production companies know what they're doing with early screenings, and they're looking to create positive buzz not negative feedback.
So even if some or many personally end up feeling it's a better movie, I doubt the critics will rank it higher than TDK.
You're completely wrong about Spider-Man too. That held strong at 92% forever before dropping to 72%. I doubt we'll see that kind of a drop with TDKR, but I think with third installments too many pre-conceived notions about how it should end or how it does end at least tend to make many reviewers go negative. That, and TDKR isn't seen as an "unneccessary reboot".
*Shrug* That, and something tells me one or some character in this movie will get the short end of the stick or seem unnecessary. In big ensembles someone will naturally feel "[my pet character] didn't get enough screentime...blah blah...this could've been two movies".