This isn’t that interesting of data, what would be far more interesting is the number of owners with 4G capable phones that actually use the 4G service. Kim seems to state that the usage is 36.6 percent, but if you read the article it looks like that is the amount “owned”.
From what I have seen and heard, most Android users with 4G phones tend to turn off the 4G radios to conserve battery life. This is likely the reason Apple has shied away from 4G data on iPhones and iPads.