But you can't say that a prediction is accurate until you have the actual data. They could still be wildly wrong in this instance; for example Nexus One users m

But you can't say that a prediction is accurate until you have the actual data. They could still be wildly wrong in this instance; for example Nexus One users may be the early adopter types who will install loads of applications, thus artificially inflating the perceived number of phones out there. Until Google actually release figures about how many were sold the prediction can't be classed as accurate or inaccurate.