Along the lines of what Evol said, here are the career K rates (K%c) or projected 2011 K rates (K%p) for players not under Eckstein's tutelage last year v. their actual 2011 K rates this year. Actual 2011 and K%c are from fangraphs player page, projections are from fangraphs's collected player projections (linked). I used a cut of 300 PAs.
Espinosa - 23.6% - 29.8%
(K%p); actual 2011 - 25%
Werth - 24.7% (K%c), actual 2011 - 24.3%
Ankiel - 24.1% (K%c), actual 2011 - 23.1%
Nix - 25.0% (K%c), actual 2011 - 23.7%
Ramos - 15.0% - 18.3% (
K%p), actual 2011 - 17.8%
I don't see any evidence that guys are doing worse at striking out under Eckstein this year than they have been doing in their career (or were projected to do) based this data.