I work for AT&T and there is nothing I hate more then this 3g/4g talk. Then the assumption that because the iphone 4 should automatically be a 4g phone? It's all one big headache.. My view on why they want to rename the 3g network is because in comparison our 3g speeds are basically on pace or better then say for example sprints 4g. Verizon isn't much better. The LTE service is going to have a cap at 100mb, that is pretty amazing IMO.
I don't think it was so much directed at you as much as the general public. 4g is a loaded word just like Droid is with Verizon, people hear it and assume things.