Cav, and his train, have already been outclassed three times this season in Dubai. He's not undisputed anymore and for his future significance check Stage 13 of last year's TDF...there you have an indication of how his future victories may have to pan out, and it implies more than a straight bunch sprint. In this stage he used sound tactical awareness to get himself into and on to the front group whilst a larger portion of the peloton were savaged by the crosswinds. None of the bunch sprint opposition - Kittel or Griepel - made it to that front group and so Cav's job was made easier.
In every pure bunch sprint since though, he has not dominated like before...