I don't think the 150MHz will make a HUGE difference, but it would be nice to see them put the 1GHz processor into the phone. I will say that the app storage probably does have something to do with many people handling the phone and testing out apps on 2.1 w/Sense. I wouldn't flag this as a cause for concern until we get solid specs on the phone.
I will say that I think the 11 homescreen thing is a tad excessive though, I really think 7 was probably quite enough (but I'm sure we all know we'll find a way to fill them :-D).
I'm looking forward to this phone even more after hearing native multitouch as well as some further collaboration with CoolIris. If you have Firefox and have not checked out the CoolIris add-in I would highly suggest it, it is awesome for doing Google image searches.