Just had the front wheels on my 306 balanced (some Pug alloy rims with no holes in the middle) on the car. When I was leaving, one of the guys their said that they couldn't be certain about the balancing until the car was driven. He said something about the potential of the wheels to vibrate up and down as opposed to laterally. Does this mean my 'balancing' is not necessarily complete?
What would I feel if the balancing was out?
Is it normal to leave the rear wheels unbalanced?