Sherlock barely dignifies John's questions with responses. Yes, really. And yes, of course he thinks John's missed something. Having him around is helpful - he's a sounding board, someone to talk to so that talking to himself isn't quite so obvious, and he fills in the gaps of information that Sherlock lacks (like the solar system). And he's company. He's familiar. Probably more than that, something like friends, but it's not been pushed to a point where he had to do much introspection on his feelings towards John.

That said, he still absolutely thinks John misses things, because it's true.

"Mm," he concedes to John's comment that this is probably their best prospect. He reads through the information they've got, and it doesn't take long at all before he's done as much at home as he possibly can. There's not much explanation given before they're off, together, Sherlock dragging John along again to investigate. It'll be hard, at least right now, until another one happens. The last death was three weeks past and the body's in the ground, so they'll have to go off crime scene photos and looking into commonalities between the victims and this would-be victim. The latter was done and they had managed to procure photographs from autopsy, thanks again to Molly and Sherlock's manipulation of her interest.

Back in the flat, it's night time and Sherlock has them spread out all over a freshly cleared dining table, bent and pouring over them.

"Look," he says without pointing, as if it's obvious what he's just seen.