I think aside from whether this problem was intentionally created by Apple (I don't think it was), I think it does show that Apple considers these web apps to b

I think aside from whether this problem was intentionally created by Apple (I don't think it was), I think it does show that Apple considers these web apps to be second class citizens. Making sure the new JS engine worked for these web apps apparently either was not on the list of things to test before shipping 4.3 or it was something that was allowed to slip. Either way, web app performance was not a release blocker for 4.3.