The driver should have the highest ballflight in your bag.
I have heard it said in the past that all clubs should reach the same height. Not sure how true it is though, for me driver is the heighest.
Remember Liftoff Jim is talking about the height the ball reaches, not the angle to get there. While a 5 wood may launch steeper it will have less ball speed than the driver, therefore it will stop rising earlier in the flight.
Hope that hasn't confused you!!