Since Avidor brings it up, check out the Wikipedia PRT Talk Page, where Avidor tried his best to fill the PRT article with his anti-PRT propaganda message.

It got pretty heated on those pages, as we defended the facts in the article from Avidor's vandalism. But, in the end, the article survived almost completely unscathed - because the facts about PRT are indisputable.

In fact, I think it's a much more solid article now that it has survived an attack from PRT's biggest critic. I like to think of it as "battle hardened".

By the way, the Wikipedia article also touches on "dual-mode" PRT, which seems similar to Brad's "hybrid" ideas.