I wouldn't say many, many. I'd say some people. ;)
When I was playing around with one for the first time I found it took some getting used to as I was familiar with iOS where things are just so **** obvious. It took a few moments to figure out what to do but once I had it wasn't that big of a problem. I got the feeling that once I was comfortable with it that it would be very easy to utilize. Though, in my professional opinion the difference between a good UI and a great UI is a good UI is very easy to use once you're used to it and a great UI doesn't have that learning curve.
True. Just most of the reviews I've read by folks and publications I actually trust seem to place WP7 over iOS. Not talking about PC World or Computer Shopper either. >.<