Most clicker type torque wrenches are less accurate going counter clockwise. Usually +/- 4% CW and +/- 6% CCW.
That said, accurate enough for lug nuts.
It has to be said that using a clicker to remove the lug nuts isn't a good idea. Using a dial type generally kills them. A beam type could be used, but I wouldn't. It's pretty easy to pull on a breaker bar and know that it's torqued more than it should be. Actually, I'm surprised they didn't break the studs.
I was partners in a calibration lab for quite a few years. Among a lot of other things, we calibrated hundreds of torque wrenches every year.