Basically 2co takes at least 24 hours to send clearance email to seller as the order was reviews for any fraud element. In start, new sellers may even take 2 to 3 days to get notified about their payment clearance. Once seller's trust is established with 2CO, then it remains a matter of just one hour.
All my payments are now cleared within an hour( automatically) because i am a trusted member of 2CO.