Since there are so many girls out there now this might take a bit longer than before...
I think that's all he meant, that there are more "low-quality" models bringing the average down, not that each model individually is "worse" than 3 years ago. The quality of a webcam model is so subjective though, that that sentiment is practically meaningless.
On a general note, I have been thinking about the way supply and demand have been discussed, and I feel the need to get the thoughts out of my head:
Firstly, I notice that the product being discussed is models, and I do not believe this is correct. A model acts as a firm, and the product, as I have sen it said in other threads, is time; specifically, interaction time.
The law of demand states that as price increases, the quantity demanded decreases. If chatting constitutes consumption of that time, then a simple explanation may be that members are not chatting because they are not willing to pay for the interaction. If the object of the discussion is to determine why members are less willing, or perhaps able, to part with their money, then several explanations have already been offered in the thread. Changes in income may make members less willing to spend on luxuries. The option of going outside may be driving some members away from the site. The discussion in the last few posts, and in some other threads has focused mainly on expectations. Several members have expressed that some bad experiences have lowered their expectations of what they will get for their tokens, and some models have expressed concern over this phenomenon. In addition, the increase in models means that members can get more interaction time for fewer token by simply scrolling down the page, though I would imagine this has always been the case. On the other side, the law of supply states that as prices decrease, the quantity supplied decreases. In other words, if you don't feel that a model is giving enough of her time when you tip, maybe you should tip more, or maybe you should find another model.
I will end with an analogy: To my mind, tipping a webcam model is a lot like tipping a busker. If you throw a few coins in their hat, you can't really expect much more than a "thank you", or a "thank you very much" for more than a few coins. If you pass that busker regularly, though, and you tip them when you pass, then they might remember you, and they will probably appreciate your supporting them with what you can. After a while, they might be willing to chat for a bit if they don't have a crowd, but you can't expect them to give up income to talk to you. Building relationships takes time, and building relationships with performers while they are performing takes money.
I imagine that some people may read this and think, "That's nice, but this is like a guy sitting there with a guitar, and a sign that says he will play a song if he gets $50 in his case. Who would tip for that?" To that I say, maybe that guy started out playing his songs and waiting for tips, and enough people listened to him to know he's that damn good. Or maybe it's not just another guy with a guitar; maybe it's a guy with a monkey and a concertina. You may not be interested, but that doesn't mean there aren't people who will be.