Backpacker, you're 100% correct. Reading a tape has nothing to do with reading a needle, and getting used to it needs some time. I always set the altitude bug on the G1000, as it's much easier to fly the bug than interpret the numbers. But there is no speed bug for en-route or approach...
Read more about my experience and G1000 tips in
G1000 - Get rid of the six-pack PP