My first withdrawal was very quick and in my account within 2 working days, this was excellent. However I have made subsequent withdrawals 12 days ago to the exact same bank account account (bank details stored on Kraken website so there are no errors in the details as Kraken have already successfully sent money to this account). I am still yet to receive any funds from these requested withdrawals despite their status as 'success' on Kraken.
Kraken in my experience is one of the best exchanges out there, but I would not want to think Kraken deliberately expedite users first withdrawal and then slow them down to MtGox style service.
Dargo, I have PM'd you.
All my withdrawals were quick, actually, I think the longest one was my 1st (1st took 3 business days, my last one was credited to my bank account the next business day, using SEPA). Anyways, delays might occur from the receiving bank as well, depending on the amount. Banks are sometimes very cautious when it comes to receiving repeated funds that are not exactly "salary" into personal accounts.
Dargo and support have been very helpful and it looks like this problem is on it's way to being resolved. It was a problem with me/my bank rather than Kraken systems. Fingers crossed