Conversationally, I stick my own concepts onto these. I tend to use bright to represent someone who is engaged and follows thoughtlines well. Sharp for someone who sees discrepancies well. Smart for good forward thinking skills, strategic and insightful things. Gifted as an adjective for a program at a school or to describe someone who has an ability that seems to lie well beyond what the limits of their level of education or training would typically impart upon them. Genius for awesome humor.
But I'll adapt to whatever use the natives have, because communication trumps most things ideological in my book.
