This is from Carbon Poker FAQ
3. How long will withdrawals take to process?
Withdrawals by Check will take approximately 4-6 weeks to be approved from the time you submit them. After that timeframe there may be a 3-10 business day waiting period depending on the postal service in your area.
Are they serious? I mean wow why would anyone deposit money on that site. If your a non american you could use one of the ewallets but us poor US players are stuck with the ole snail mail checks.