You asked! I know we had numerous Toyotas (Camrys, Corollas, and 2-WD trucks) go past 150k miles without the bearings being greased or tightened. A friend had a lightly used Ranger where the bearings fell out of the cage under 100k miles, and they were changed in our Tempo at 100K miles. Our Camrys had the same use as his truck. Our trucks are abused, like 20mph through snow covered corn fields, water level well past the hubs (half way to the windows), holes in the oil pan, stray bullet holes, broken in 2 shocks, broken front springs, bent rims, a bent front brake disk... And thats just the last 2 trucks. Maybe some shop, sometime, greased or tightened some of them when we didn't know, but I doubt it. They don't do that around here for free.
G-