Today I think was an odd anomaly. As I mentioned above, the key was knowing you could use the same letter twice. I don't know how much time the game owner invests in choosing words - there is some variance in terms of daily difficulty.
Also, I think that one or two is basically lucky, three is really good, four is above average, and five is about average. So no one is building you any monuments for getting it in four.
Long story short - don't yuck our yum.