FanGraphs: Three fast starts to be believed - The Max Info Blog - ESPN:
"Naturally, at this time of the year we view players with a certain air of suspicion, and rightly so; Small sample sizes make trusting early season statistics difficult. However, there is a point in time when certain stats can become more trustworthy than others. A study done by Russell Carlton showed that after 50 plate appearances, a player's swing habits can be a reliable guide to what's going on. In the case of Colby Rasmus, his swing habits give us a substantial reason to believe he's a changed man."