A survey of family practice docs conducted by the AAFP estimates that some 20% are now using EMRs. Given that I know something about surveys of this topic, I remain a little dubious about the numbers until it’s much clearer how EMR was defined and who was surveyed, but the direction is at least clear. About 13% are using one already, 7% just starting up and another 50%-odd intending to start in the medium term.
Of course in many other countries the rate of GPs using the EMR is well over 80%, and in most industrialized ones it’s way higher than here. So we have plenty to aim at if we are to really have the best health information system supporting the "finest medical care" in the world.