If it was fake, I'm sure Ronaldinho would have the integrity to come out and say it's fake. He's not stupid enough to lie about something like that when it can be easily disproven by tech-pros. That would make him look stupid.
I saw a video of Portsmouth training and even Laurent Robert could hit to post about 2-3 times in a row. I imagine it's not as hard as we think it is for professional footballers, really.
I'm not sure how real it is, I do have a feeling it is though. Don't they have competitions where they see how many times someone can hit the post and stuff like that? Ronaldinho has pretty amazing skills as well. But I don't know.
I think someone misinterpreted Bob's words. I don't think he'd threaten to quit right after that happened. He had a new interview on Sky and all he said was he would give other teams a thought but his priority was to stay at Arsenal.