@kurt
you're using semantics here to try and spread misinformation, attempting to give FUD off.
So, to repeat myself slowly, so you can understand...
AGP
is
a
port
off
of
a
PCI
bus!
On top of the normal PCI bus, AGP also adds functions, such as sideband, memory polling, extra modes. However, the PCI bus is still there, ready to be used. More than 1 motherboard has just wired a PCI bus right up to the AGP port, and let it stay that way. In many cases, people just don't know the difference. Their AGP cards work, so they never bother checking with how the drivers run the bus that pushes the data to that AGP port.