Seems the substitute teacher is out, and the regular teacher is back in the classroom, at least if you believe the Wall Street Journal in a fascinating glimpse into how Infinite Loop is operating nowadays.

The Journal, citing no sources by name, says since Jobs' return to the office after recovering from liver transplant surgery, he has been micro-managing every detail connected to the development of the long-rumored Mac tablet computer.  None of this should be all that surprising.  There seems to be a fairly dramatic reset going on inside Apple's hallowed halls with workers once again having to answer to the man himself, rather than the surrogate Tim Cook who filled in for Jobs during his absence.  Interesting that this story is breaking now; that in some way, a very calculated Apple Inc. seems to be sending the not-so-tacit message that despite a deep bench of executives who enjoyed their fair share of the limelight while Jobs was recovering, are now once again fading to the background. Tim Cook, widely lauded, is today the guy who fostered a more relaxed culture at the company. Jobs is in charge.