I'm sure they share results and spreadsheets after races with each other through skydrive or office365 but to insinuate that they're sharing track data in realtime through "the cloud" is just kind of silly
I've read a technical paper on this. Massive amounts of data are passed back to the factory. Lotus is looking to cut costs. If more real time data can be sent back for analysis rather than done at the track they can cut travel costs by leaving people and computer power at home.