User blog comment:D. Cello/Assassinews 10/19 -- ACR new info/@comment-92.24.53.104-20111101191210/@comment-2083062-20111103014344

In terms of length Ezio's sequences are of course the longest, with Desmond's being shorter, and Altiar will be the shortest but most likely they will be more action packed then Desmond's (keep in mind the Desmond sequences most likely take place before the events of AC1 and thus before he learned Ezio's abilities)