Also on these boards
I know this is annoying to John, but I like to appreciate this. Sherlock takes his time to tell Anderson, Lestrade, and Donovan they're idiots. Yet, after a time, he believes John to be on par with him. Sherlock used to make fun of John all the time with an exasperated tone. Here, he respects John to the point of believing John as observant and analytical as he.
“You take this cold, remarkable, difficult, dangerous, borderline psychopath man, and you wonder what might have happened to him had he not met his best friend, a friend that no one would have put him with – this solid, dependable, brave, big-hearted war hero. I think people fall in love, not with Sherlock Holmes or with Dr. Watson, but with their friendship. I think it is the most famous friendship in fiction, without a doubt.” - Steven Moffat