Food for thought: all this wisdom is really an attempt to prioritize how bits hit your browser and is very much due to legacy issues. These are hacks, albeit clever and measurably better.
HTTP2 when it comes (2014?) will negate the need to inline/concatenate CSS or cook up image sprites because it solves it at the proper level, the network layer.
HTTP2 when it comes (2014?) will negate the need to inline/concatenate CSS or cook up image sprites because it solves it at the proper level, the network layer.