Some business myths seem impossible to kill, no matter how many times they are shown to be rubbish. One such myth is first mover advantage. Entrepreneurs looking for funding and would-be pundits extol the benefits of first mover advantage. "We will be first the first mover, we will secure the market position and create barriers to entry.", is the sort rubbish that is pushed.
Over my 30 years in business I have found that second mover advantage almost always beats first mover advantage. The second mover tends to look at what the first mover is doing right, what the first mover is doing wrong, and enters with a better/cheaper offering. Two recent examples of brands entering a market late and tearing it apart are Google (remember Yahoo and Alta Vista) and Facebook (which was about the 100th social network).
All of which is a very slow way of recommending a really good post by one of the best MR bloggers, Nigel Hollis. Nigel's post looks at first mover advantage in the context of Joost and then he goes on to back his argument by looking at supposed cases of first mover advantage.