BFL's ASIC can match that if they want. At 40Ghash their ASIC was running at 500Mhz, and they said it can do 1Ghz but not all chips will reach it. So 72GHash is possible.
and that's still a conservative estimate.
These initial numbers are conservative estimates, but we expect that firmware and software updates will be able to iteratively increase hashing power as well.
so it might be even faster than 72 gh/s
in normal circumstances, i strongly dislike luke-jr, but at times, he can work some magic.