"I thought you were becoming strangely attractive lately...."
It's age. Your eyesight is going bad.
"2. I never promised - nor put into a contract - anything regarding future traffic because you can never predict what the future will hold."
There are a couple of ways to look at a statement like this. For example was there "a contract" in which such a statement could be "put into" or not. If not, then one could consider all of the statements made during the course of deal, and whether a reasonable domainer would have considered the traffic stats to be a material condition, sometimes called a "basis of the bargain", or whether it is customary consider more than just the name transfer per se as constituting what was bargained for.
And, if there was a written contract or memorandum of some kind, did it disclaim any representations or warranties outside of the four corners of the document itself?
It's not cut-and-dried either way, and I would lean with Howard in the "puffing" angle here. If the "real value" of everything were known to a certainty, then hardly anything would ever be traded for anything else. The only time that person A would ever trade his X for a Y belonging to person B is when both person A and person B have diametrically opposed opinions on the relative value of X and Y. Each of them has to value what the other person has more than what each of them has initially, or else there is no deal to be had. In a perfect universe of omniscient beings, that can't happen. But in this universe, it happens all of the time.