Boy oh boy....what a thread! And what do comment on first...LOL!
Ok, first of all, I own a WP horse....and he sweats like a pig in the summer. His head even sweats! No harm, no foul.
For the IBHA, ABRA, AQHA stuff. I used to show IBHA, now I've shown AQHA for close to 2 decades.... and there IS NO comparision to the high level of AQHA. So yes, moving up from IBHA/ABRA to AQHA and being successful is a leap.
For the WP trainers...yep, lots of bad and LOTS of good ones. I happen to know quite a few good ones. I find WP trainers at the local open shows...NO MATTER HOW LARGE, just haven't learned how to train a WP horse yet. They are a few years behind the times.