SFML has for a long time had a PR issue. It was always (imho) by far the best 2D C++ game library out there for people targeting linux/windows, for various reasons, and with all the improvements of 2.0 there will simply be no doubt at all.
But for some reasons the library still isn't known enough. When people on popular sites like stackoverflow (or gamedev.stackexchange.com, or gamedev.net... etc.) ask for 2D libraries and clearly state that they use C++, 90% of the time the first poster will still suggest SDL.