No idea, sometimes it looks like some people will like anything they think can be used to knock the iPhone.
Personally I've never had any problems with Windows Mobile (although never used 6.1 have used 5 and 03 on a pda). It was fast, rarely crashed and generally did the job...
I had 2003 and have 6.0. It's always been fast enough, and doesn't crash too much, but it's not easy enough to use for me.


