Yes, I'd worked out that scanning the AI and the TC should tell me whether the instruments agreed with each other ... whether I'd get it right for real would be another thing of course.
Don't forget airspeed! If that is stable around cruise speed [or climb speed, as appropriate], nothing bad is going to happen soon - except for CFIT...
In a G1000 plane, you are MUCH better off - other than a failed vacuum gyro which just topples (and before it dies completely, can mislead you badly), you get the big red cross. If you still see the attitude, you are pretty much guaranteed that it is accurate.
In a vertigo situation behind a G1000, I would trust the PFD after a quick cross check with the standby gyro.