I've been researching To'a/toas on the web. There's a lot more information available since the last time I looked. There's a lot to indicate that To'a/toas did originate from asian styles, but specifics are hazy. One site had videos of the empty hand forms, and they're almost 100% identical to what I was taught.
http://www.international-kungfutoa.c...0Download.html
I think these forms were executed reasonably well, although I have issues w/ the forearm angles in some of the blocks.
It looks like a large number of schools have added or modified techniques, as did Safakhoo. To'a, IMO, is a good style to start w/, but there are some things missing. Most of the sites indicate that To'a is a persian style, but I see little evidence of that. It still appears to be a modified asian/chinese style w/ iranian/persian influences.