Remember in school when they taught you that due to gravity and object falls at the rate of 10m/s/s (sorry I dont know what the imperial English equivilent is for those from the us).
Well in a beer bottle, yeast sediment falls at the rate of, 'in its own sweet time'.
If you take a drink before the suggested time has elapsed there is a good chance that you will get a mouthfull of yeast cells which supprisingly enough tastes of yeast.
If you take a drink while there is a haze in the beer, caused by yeast there is a good chance supprisingly enough, it will taste of yeast.
If you wait long enough, all the yeast cells will sink to the bottom of the bottle and compact in the sediment and if poured carefully the beer will not have any taste of yeast at all. Supprisingly enough .
Be patient...and if you cant be patient, learn about finings, ironicaly the taste yeast should impart on a beer doesnt taste yeasty but thats another story.