I have a theory that many S gauge modelers are in S because there hasn't been much available historically and they actually like it that way. Several of the comments above seem to bear that out. Personally, I just don't understand the thought of asking a MFG to slow down. The ONLY scale I have ever heard that in is S. Just look at the O gauge crowd... They can not get enough product. Even if they don't have room to run it or store it, they continue to buy. Same with HO and N.
I feel just the opposite. I have put S on hold because even at this "fever pitch" 
they still aren't making what I want fast enough for me to do what I want to do. At this rate it will still take years before I can build the railroad that I want in S. And that is if I get lucky and they actually make models I want.
So please, don't ask them to slow down. If you can't afford something right now then pass on it and pick it up later. People that have been in S for a while are in for a change. Lionel and MTH are going to make S feel much more like O gauge jr. than what you are used to in S. That's just the way it will be. Get used to seeing lots more products than your budget will allow 
That is the way it works in all the other scales. S won't be any different.
