the exclusivity deal allowed android to gain a foothold, but i don't see android as a competitor to iphone, just an alternative. people who buy android phones are people who don't want an iPhone and probably wouldn't have bought one anyways.
I also happen to be someone who influences my friends and family on technology. When Android turned out to be a great experience, I told other people. Now my mom, sister, sister's boyfriend, both brothers-in-law and their wives, and my mother-in-law are all Android users.
Every single one of those people would have purchased an iPhone if Android wasn't around.
FD: Until a couple of weeks ago I owned no Apple products except a very old ipod nano someone gave me years ago. I'm no fan of Apple, but it seems unrealistic to second-guess the success they had for the last decade.