There's definitely more pressure for WB to move now. The problem for WB is that the move was a publicity stunt, the were trying to make headlines they were going head to head with Marvel, even though the filmed wasn't named. It backfired when Marvel announced that it was Cap 3.
 
I disagree with those saying the numbers mean that they should move the film back. Quite the contrary, if TWS had the TASM 2 date, I think that you'd be seeing even bigger numbers now. You hope that you're not going to get the 3rd movie "let down" common to a lot of films in this genre, but there was such a dramatic improvement in quality from the first film to the second, that it will be difficult to have that kind of improvement. Even poor films like Spider-man 3 have performed well in that may slot, where in April it can be disastrous and usually is.