Johnson City, TN
If it's anything like the pathetic 5gb cap they have on their 3g network, I don't think anyone will want to switch. Most DSL providers do not cap and don't have a real reason to since it's so ridiculously slow in many areas it would be impossible to hit the cap.
On the other hand, if they do have a cap BUT it's something reasonable like Comcast's cap I don't think that would affect the decision to migrate to VZ LTE for the vast majority of users.
Only time will tell, but Verizon Wireless is currently a disappointment in the cap department with their paltry 5gb cap.