Speaking to reporters on Wednesday, AT&T Mobility boss Ralph de la Vega said that iPhone users aren’t defecting to Verizon Wireless any faster than the carrier expected.”We haven’t seen any surprises, and everything is pretty much within our expectations,” de la Vega stated. Verizon Wireless finally launched its first Apple smartphone — the iPhone 4 — last month, and some analysts believed hoards of AT&T iPhone users would flock to Verizon as a result. AT&T, of course, has found itself under much scrutiny resulting the iPhone’s from poor performance on its network in several major metropolitan regions. De la Vega would not share specific numbers so in there may in fact be a mass exodus underway, but early indications do not lead us to believe that is the case. Analysts at Wells Fargo said earlier this week that AT&T is expected to lose 150,000 contract customers in the first quarter of 2011, down from the 225,000 it originally projected.