On the numbers, a busy FTO will have much more 'bad press' than any quiet FTO in the US or UK.
Also, this is not an American site so don't assume that any FAA FTO is 'better' than a JAA FTO in the US.
As the post says above, a big school should have a lot of happy students too. I know people shout louder when they have had a bad experience but there is simply too much bad press most with evidence of these big JAA FTO's. I can't make any comment as I've not visited any (yet).
I'm not only looking on here for feedback on the schools, many schools like EAA have been talked about on other forums such as the American version of pprune ... and dare I say it, nobody has a bad thing to say about a handful of FAA flight schools in the US.
Same goes for a handful of UK schools, I've yet to come across any ex-students saying they were unhappy with CTC or Airways to name but a few.