To answer all the speculation on what the characteristics of the new solid state artificial horizons, here are what the factory says about the LX Nav S80.

Question: Can you provide an explanation of the performance standards?
Answer: The internal sensors and software can respond at +/-90 degrees/sec. The internal gyro can measure up to 2000 degrees/second which is 6 revolutions/second.

Question: Any limitations on aircraft position or rate of movement?
Answer: No. There are no limitations when used in a glider.

Question: Can the unit lose orientation and "tumble" like a mechanical unit?
Answer: No. It's not like a conventional gyro. It recovers from any position.

These units are always on and always registering the aircraft orientation. Switching to the artificial horizon screen just activates the display.