For the fun of it, I ran Xen beta, Lxde beta and lxde 2009.4 in vmware under Windows XP.
The boot times under my slow low memory dual core laptop were:
LXDE 2009.4 -> 80 secs
Xen Beta -> 95 secs
LXDE beta -> 100 secs
Interestingly, the new LXDE beta is 25% slower then the previous final release.
It is in beta, however I can't help think that it is somewhat bloated.
I mean, 25% that's quite a number to make up in the final release; just saying., - I'm innocent

I noticed that the images sizes are significantly larger, about 200MB larger at least for the LXDE edition. What did they add that takes up so much space?