Just make sure you checked them in the morning after hours and hours of not being used. Otherwise, the pressures read much higher.

Nevertheless, I have also found the dealers overfill them significantly.

i try to stay with within the psi

Got an oil change at Mercedes of Buckhead a couple weeks back. I was thinking my car was riding a bit rough so I checked the tire pressues and sure enough...42 PSI all around!!
What the heck are these dealers thinking?