There's no evidence to show otherwise. Bitcoins are either (1) hoarded or (2) sold on the exchanges. Nothing else is happening, man. Accept this!
Have you been to the Market section of the forum? People are buying and selling goods and services left and right! I personally was not one of the early adopters with 10s of thousands of bitcoins but I've already bought a computer, an iPad app, and a keepsake coin using bitcoins. Additionally, I have tipped and donated to some people using bitcoins. I consider myself to be a fairly frugal person so I'm sure there are others who are spending even more than I am.
I am glad for the stable price as I think it will encourage more merchants to accept bitcoins.
+1 I've performed over 200 transactions and less than half were related to currency trades.