Hi, I mean with high amounts something like 500.000 USD, which exchanger withdraw it without problems, bitstamp, mtgox (in EUR), btc-e?
I mean its acceptable if they request for an passport/bill copy, but its not ok if there is a straight limit or serious delays.
Bitstamp wasn't supposed to have limits. There were some rumors that they did a transfer of more than 700k in about a week.
The best way to find out it's to mail/phone them directly.