Using 2 Android phones (HTC Rezound and the Moto Droid Razr), found the music title faster (had to play some games to filter the noise in the video), tweeted faster, multiple social networks faster, picture to Twitter faster -- doubt the PC Guy will mail me $400 ($800 if you consider it was done on both phones).
Friend has a new Windows Lumina 710 that was puschased because it was from Microsoft and... Exchange email works, but other aspects associated with Exchange and SharePoint don't. Her tech support folks finally were able to dig the information out of Microsoft that it's not yet supported. Phone to be exchanged (and I don't know for what, yet).
I don't understand the lack of immediate and seamless enterprise integration with Windows Phone 7.5. It's a nice social phone.
Bottom line, it's not about the device, but about the entire experience and supporting infrastructure.
David