The sales guy was being a sales guy.
You have no idea what his instructions or background may have been.
He may not like the Savage. His experience may say that newbs have better luck with the Traxxas products, how knows? Maybe he figures they will be back soon for repairs and he does not like working on the Savage. Maybe he sensed that he could make a sale if he pushed the things that newbs like (reverse, ez-start)?
His store may have been over stocked on Traxxas stuff and he was being told to push it.
His store may have had a really good margin on Traxxas and nothing on the others and he was told to push them for that reason.
Maybe there was a sales contest about who sold the most Revos or VXL's or?????
Maybe you were a bit hypersensitive because he was not pushing what you considered to be a better truck.
I don't think that you know enough to be judging the salesman.

Would I have said something? Maybe, maybe not. It would have depended on the salesman's attitude - some guys welcome customer help, some loath it. It also would depend on my mood, how much time I had free and several other things. In the past I have talked to the buyers/sales guy and also have just shook my head and walked away.