A few years ago I decided that stronger pins are better for the long run (1000 passes). Rather then the 0.155" wall pins in higher power applications the piston manufacturer's now offer 0.185" wall pins.
I do believe there is something to pin strength depending on the piston weight and power production. I have a friend that used TRW pistons in his 440. To help reduce weight he removed material from the inside of the pins. During a tear down and inspection he found a hand full of pistons that cracked in the pin boss area. I still can't convince him that the pins flexing is what caused the cracks.
