fwiw, i think most people critical of buy and hold (disclaimer: i have an account that i dedicate solely to buy and hold stuff - usually a minimum of 3 months and a maximum of years timeframe) fail to take into account the power of dollar cost averaging in regards to smoothing an equity curve.
buy and hold would have SUCKED if you put in all yer money in 1929 at the top and held. it was not at all bad if you were DCA'ing up to, through, and after the crash.
i've seen the #'s crunched