I know where you guys are comin' from, but I really think high apm only matters if you're going for high ladder rankings.
Halo Wars has kinda babied us by making it pretty easy to get top 500 (or even 50) of a few ladders, but Starcraft is just SOO much bigger than HW that I'd be more than happy with top 1000 or whatever.
Plus, I've been playing the beta and SC2 = major, fast paced ass kickin one way or the other ^^
*whereas HW sometimes drags on due to unlimited resources
*sometimes the pace is TOO fast, as a lot of beta testers have been saying, because there are EXTREME unit counters. imagine... scarab vs jackals.
EDIT: I gotta say that the UI is really simple actually... it just takes one game's practice to remember that e = workers for protoss whereas s = workers for terran, etc.
and space bar = right d pad... double clickin' units works like in HW. there are just shortcut keys so that you don't even need to move the mouse once you've got a unit/build selected.
2-0 me-DC Shizface in standard 1vs1
1-0 me-DC Shizface in deathmatch 1vs1 on 2vs2 map :D