Well go back to between 2004 and 20062006, Garmin-Cervélo, was known as TIAA–CREF and they were just merely a Continental team and were a million miles away from racing the Tour de France, and JV had a goal of racing the Tour by 2008, which lo and behold they did. Sure it's ambitious they are aiming for the Tour by 2015, but you need to have a goal to work with, and use that as a springboard to get more sponsorship and to go to the next level.
Do I think they will be racing the Tour by 2015? No personally, but then I never though the same would happen with TIAA-CREF, but they will need to employ more foreign riders to bring the caliber of the squad up to be aiming for Pro Continental status in the next year or two, and do more racing in Europe, and move up that way.
As somebody who was born in New Zealand and travels on a NZ passport, I would love to see this happen, but I don't think they will be racing at that level in four years time.