If you people had bothered to ask support why your SEPA withdrawals were slower than expected, which would only take a minute, you would have got the same answer as the guy i cited. Why do people bother with multiple microtransactions via SEPA anyway? Doing all in one withdrawal makes sense. It lessens the load for everyone.
There was a time (still may be true) that small transactions were used to fill in the little gap between a few larger wires clumped together and the actual banks limit.
To explain since that sentence didn't make much sense....
Say MTgox can send 50k a day SEPA.
They have 3 15k wires, totalling 45k, then they take 10-15 smaller wires to fill in the gap.
This was mentioned by tux at one point on IRC (ages ago), and i'm not going to dig up the reference, but I bet it can be found someone in this thread.
Also, withdraws over 10k are specifically noted to take a minimum of 2 weeks on gox's FAQ.
This 20 day stuff is all news to me though.