The 20,000 is probably pretty close to accurate, so if the 16M number sold is accurate why has there been such an impact on the video card market?  You can't reliably find 5850s, 5870s, 5970s, or 6990s in stock anywhere, and even 5830s are going.  If we're only .1% of the market, it shouldn't have had that big of an effect.  Does that mean there is like 50k G/hash in cards purchased recently and still waiting to come online?

It's possible, and I know I'm part of it since I bought 27 cards in the past week