Doesn't surprise me at all since I have a spreadsheet with sacks allowed and sacks per pass attempt.
Partly because the o-line sucks and partly because freelancing QBs like Vick tend to get sacked more. Randall Cunningham was probably the most sacked QB of his era.
He's more susceptible in the pocket when he does his Barry Sanders, run from sideline to sideline just to throw out of bounds and take a crushing hit. He needs to be more decisive with his reads.