Not necessarily. Tavaras had success in 2007. The Reds are supposedly working with him to get back to that approach. They said he changed his approach in 2008.
Dickerson did have a nice season last year. However, 100 AB at the end of the season is completely different than starting every day after teams have a scouting report on you, as Stynes and Nunally found out.
I just wonder how Tavaras 2007 season can be written off as "luck" by some, yet Dickerson's 400 AB in 2008 signals a huge step forward? IMO, we're not really sure what we're going to get from either player, that's why it's wise to have some depth, in case one of the guys completely falls apart.