It depends on how aggressive you are. For example, my OEM tires in my Bolt lasted 60,000 miles, but the typical Bolt driver was replacing them at 30,000 miles or less. The reason (in my mind) is the OEM Bolt tires make zero noise when spinning, so anyone driving even slightly aggressive from a stop (especially on a turn) was having wheel spin and not even knowing it, so the tires wear down rapidly. I notice the same thing with the MYP tires, and now the Gemini wheel and tires... I KNOW that I am getting wheel spin in the back from a dead stop if I mash the go pedal, but I can't hear anything from the tires...
TL : DR If you drive it like you have kids prone to motion sickness at all times, they will last the lease period... if you have any fun at all with the car they will need to be replaced about 2 years into a 3 year lease.
Keith