That was my reaction too. Just read his post history of 15 posts. You'll understand...or not.
Simply a case of "I am an ipad guy but I am sure envious of that 7inch form factor so I think I will sign up in Crackberry and harass Playbook owners and tell them how much the playbook sucks" kind of thing.
If you look on the top of the page you will see there is a link to iphone central. People change teams all the time, no sense in grieving the one your leaving. Just go to iphone central, come back here next time you get a blackberry. The sites are all the same family.