American Express Membership Rewards - Shortened Grace Period?

The closing date of my recent chaarge bill was 3/23/09. I received the bill on 3/28/2009 and the due date is 4/07/09- leaving just 10 days to pay from the time I received the bill.

http://www.flyertalk.com/forum/american-express-membership-rewards/933050-has-amex-shortened-time-pay-bill.html#post11494707