Hell, I'm perfectly content to let well enough be and just enjoy my early upgrade. I'm just continuing the discussion because I'm on a discussion forum. Someone asked, I answered, maybe this will see if there is correlation on what qualifies you or not, who knows.
I would too. I'm on an individual plan that I pay ~$130/month for and yet my upgrade date is 18 months after joining vs AT&T's 12 month upgrade schedule.
It definitely helps to find what's common among those getting early upgrades to see how Verizon's upgrade schedule compares to AT&T's. It's already interesting to see that AT&T easily allows early upgrades for the iPhone (6 months or more into contract) while Verizon allows for early upgrades on everything but.