We're here at the 2013 M5 & M6 press drives at Laguna Seca and I've just spoken to BMW NA on the M5 deliveries matter.
Final CARB certificate was issued today and the 2013 M5s are now clear to ship to dealers. They can start shipping to dealers immediately and the first deliveries probable by the end of the week.
There is no hold until 9/1 (to coincide with the first date of european deliveries). The hold up has been due to certification.
Congrats to our soon to be owners!!