AndrewSchick: So for arguments sake (no promises) you would rather a 500Gb plan for (lets just say) $99 than an unlimited plan for $99 ... Even if there was no real world difference in speed??
Depends on the reputation of the ISP or plan.
I think with a data cap people tend to treat it as a target and try to use it all or they feel like they didn't use all the paid for.
Also I think that un-metered in the better more honest term than unlimited.