I dunno, but for me amule 1.1.0 is quite slow too... in fact, even after being online for days, it just shows downloadrates of some 2-3 k/sec... very bad, imho. Emule is worse than edonkey, and xmule is worse than emule (if you compare download/upload and sources) and amule seems to be worse than xmule? its strange, cuz amule isnt that much different from xmule...
anyway, I just hope this improves. I have no clue why these problems are there.