We are sorry about the delay. The truth is that we don't know how long it will take to process the deposit. It has taken anywhere from less than 24 hours to several business days. We will keep you updated.
Then the Mt Gox website needs to say this. Right now it says "Deposits will be credited within 24 hours (usually faster, depending OCR checks, so please write legibly)."
Note the "usually faster".
I understand the business realities. What I am saying is just tell us the truth, up front.
it's been my experience, on both sides of customer service, that when you set expectations realistically, everyone is happier.