How many miles has the car done since the kingpins were fitted? Has the front suspension been regularly greased? Has the car got rebound spring gaiters fitted?
If neglected, it's entirely possible to knacker a bush in 10k miles, and the nearside lower bush is always the first to wear. But if it's not done many miles and has been looked after, it may be that the tester was being a bit too picky.
If/when you have the bushes redone, fit hardchrome kingpins and a set of rebound spring gaiters, then you'll not have to worry again.