Look there's no difference between this type of post, and the "screw you Apple I'm switching to Android" post, with the exception that with one people fall allover themselves to lay down the welcome mat, and with the later they can't gather the torches & pitchforks fast enough to run the offender out of town while exclaiming "don't let the door hit you in the a$$"...
While true neither type of post are technically detrimental to the boards, at the same time they're not necessarily beneficial either, so it's easy to see why some would misconstrue them simply as "pretentious" & "attention grabs".
Now if I'm wrong about this, and a large number of members appreciate this type of interaction. Then I call out to the leaders of iMore to create a sub-fourm that would be dedicated to being a "welcome wagon", an appropriate forum for members to high five & slap-a$$ each other until they're blue in the face on what they spend their money on, and of course a place were you can give the community the finger when it's time to move on. This way the product forums can stay focused on discussions relevant to the products they serve, and others have a place to go to get the attention they need. At the end of the day I think everybody wins with this scenario right? ...