So, if you want to stick with the lazy label. I'd translate it to mental efficiency obsessed. It's an internal drive behind innovation and successful cognitive strategies and played out fully you end up with the deep learning and fast thinking we admire in our GT kids.
Since efficiency revolves around cost/benefit analysis, then one of the problems is that the independent thinker driven by internal wiring to seek efficient mental solutions is assessing the cost higher and the benefit lower than the adults in the situation are. So the external observer sees laziness and the internal observer sees waste.
One metacognitive strategy to slowdown and be careful is to consciously assign a probability to whether an answer is correct. Then if the probability isn't satisfying to mentally assess the time necessary to raise the probability to a successful level. Some people have an instinct for probabilities and the brain gets some interesting work at that; not certain if all kids would get this or how to instruct them if they don't.
A quick test when you hear an impulsive answer is to ask them what the percentage chance is that they are wrong. Likewise, if they say they don't know an answer, ask how long they think it would take to figure out.
