I've had Smaug for just over two weeks now, and he still hasn't defecated (or passed any urates/liquid waste that I have noticed- the viv smells perfectly fresh and I've not seen anything, though I've not done a full substrate change yet).

He did copious amounts of both in his little box when he was being transported (poor thing, can't have been nice sitting in it) and I've fed him thrice since then. I'm feeding every 5 days and the first two meals I gave him were on the small side (he'd been on rat pinkies with the breeder so I wanted to carry on with those for a couple of feedings until I was sure he was a good eater).
Yesterday I fed him a rat fuzzy for the first time, so quite a lot has gone in- when can I expect anything out? XD

Not complaining about the lack of snake excrement- the stuff in the travelling box was vile- but I'm starting to get a tad concerned now. I was under the impression that they went more or less weekly.