I consider myself a strong software developer, and let me tell you: if someone is acting like a dick now, it won't matter if you're on the same level as them or not. So long as you're treating them with courtesy, respect, and keeping communication open, if they're not treating you the same in kind then that is their shortcoming.

To your #3, while I'm confident in my abilities, I don't think truly excellent developers have rotten attitudes. Someone who thinks they're perfect already will stagnate. Personally I _want_ to look for rooms where I'll be the dumbest person there. It's how I grow as a developer.