if this is true, probably the R670 will be their new midrange card (ie HD3600)
and the R680 (roughly twice as fast as R670) their new high end. But then
the R670 must be merely as fast as the 8800GTX/Ultra to respect the GFX
tradition where new highend = twice as fast as old highend.

interesting times ahead, and if this theory is true, we might see the revival of
GFX competition.