Dish has been tranquil about facing a longer FCC review period for its planned LTE-based 4G network, and now we might have an idea as to why. The satellite TV giant is telling the FCC that it only expects coverage to reach up to 60 million potential customers "within four years," or about 2016 -- six years after MetroPCS and Verizon first flicked their respective 4G switches. This is also assuming that the 3GPP cellular standards group clears the AWS-4 frequency band for LTE use. There's speculation that Dish is giving the extra time so that it can sell the spectrum later, but we'd take the safe road and assume Dish is serious. After all, AT&T wouldn't be trying to set tough conditions for Dish's LTE if it didn't think there was possibly significant competition on the way.