Quote: so the K3 does not outperform all other lenses,just lets them go a bit faster..
and going a bit faster isn't a performance increase? ... I'm shaking my head here.
The Pentax execs said the new lenses will take advantage of the K-3s new autofocus capabilities abilities none of the other cameras posses, the older lenses by inference, do not. That's the reality.
If you want to see what the new lenses are capable of, you need to try them on a K-3. They may work well on older cameras, but the K-3 has stuff the older cameras don't have. It's a completely new AF system designed to get Pentax close to Nikon and Canon.