It’s surprising how many questions ending with a question mark are blown off by the person being questioned, because they don’t know what a question mark is.
It's surprising how many people backpedal and claim their rhetorical questions aren't, because their assumptions about the other person are rebutted.
"So you think ______?" isn't a question. It's a statement of fact with a misplaced question mark. If you want information, ask: "So, do you think ______?"