Revenged... I can see how your tactic works for most races, as people do tend to go off too quick, and your tactic certainly is less painful, but for those searching for a PB in a 5k, it's usually better to aim for a
slightly quicker first half, and hang on in the 2nd half

Of course if the first half is done too quickly, it'll be a complete waste of time and a painful 2nd half of the race!
Note though, that's only the case for 5k's virtually all other races you're better off running a negative split
Particularly important (as you say revenged) is the very start, a highly elevated pace at the start will see increased levels of lactic acid (read: discomfort) for the rest of the race
