Looks good man! You seem to be well proportioned, but I really can't see your back to tell...so I can't offer too much good advice. If you can't come up with a better pic, maybe some stats would help you out. Try posting them...
Also,I don't think people are calling BS out of jealousy, etc. I think they're calling BS on you because you're using a professional photo...not the standard digi ****, like socrates is sporting. Check his thread, he has the digi's to back it up.
I believe you, though...no reason not to. My chick models (some high fashion, a lot of hair shows) but she's not too tall so she doesn't get as much work as she'd like. She's only 5'6", but she's asian so she get's a little bit of slack. She made some good money...hell like $4K for some 1 to 2 days shows. She wanted to get me into it, with her, but now we're both too busy with college, etc. I'm surprised her agencies haven't been getting pissed at her. LOL.