IMAX Cut Length?

According to Superherohype.com in a post about the M&Ms advertisement and Tokyo premiere, the "slightly longer cut" of the IMAX version of Transformers 2 is less then a minute longer. The IMAX cut is supposed to have 4 extended scenes filmed in the IMAX 70mm format so another important question is how many minutes are in the 70mm filmed scenes (as I would assume more then 30 seconds). Thanks to Hitman450 for the link.