I searched for "q", and it worked. Incidentally, there is a camera by that name, and threads about it camera up!
When I first saw xF a year ago I was disappointed to see that the search wasn't better than that of other software, namely vBulletin. However, Enhanced Search looks like it changes everything! It's really tempting me to convert my existing vB3 site to xenforo, although I can "just" upgrade a customized site like that overnight
Not yet- but I'm not worried about that as much as I am all the mods I've written for vB. Sure, not all of them have to be ported, but there are a lot of custom sections that contain content that would have to be re-written/re-integrated with xF.