Is it still possible to withdraw BTC without KYC?
No.
As of this morning their header messaged changed to "Attention Users: All withdrawals and deposits require account verification."
And yes, apparently they consider BTC transfers as "withdrawals."
That message said something specific about FIAT CURRENCY needing verification about 12 hours ago. But alas, as I was complaining in emails with them about the implication of singling out FIAT CURRENCY the message changed.
DO NOT DO BUSINESS WITH MT GOX unless you feel comfortable in handing over all the ID people need to forge your identity. Even if you just want to get BTC back out. What a scam. They didn't mention this when I asked for a deposit address, only when I attempted to withdraw. Total thieving extortionists, requiring my private ID information in order to get back my deposited BTC's. Since when does KYC say they need my ID for BTC's? It doesn't as far as I know. I suspect insolvency is prompting them to do this to slow down or stop withdrawals.