But we all have 195° Thermostats?
Is this because the temp for the gauge is read at different sensor farther back in the head?
I've never tried it, but have read posts where people who put temp sensors/senders/capillary tubes for After-Market Gauges in the water jacket far away from the thermostat, actually see temp go up/down with engine load.
If you put the sensor at the typical spot, the thermostat housing, you get exactly the thermostat temp and its stays there constant as long as your cooling system is working right.
Makes sense, the thermostat is the spot where the cool/warm water mix and the thermostat opens/closes to keep the fluid at its temp. Farther back in the water jacket it gets warmer.