I have a feeling that this isn't just an aborration. I think he's going to take a lot of heat for a while. If you were batting against McGrath, Gillespie, possibly Warne, Brett Lee is your output for freebie runs. He either bowls real short, or half volleys on most occasions. Against good batsmen, he's going to go for plenty.
People will look back at his career as a bit of an enigma, a world class strike bowler to be feared at the start, a couple of injuries, and then a hit me and hit me hard type of bowler.