Grey... Do you think that Zobrist is just a flash in the pan at this point? He's got some very nice numbers in both avg and obp throughout college, the minors and team usa and as you've stated the swing mechanic seems to definately have increased his power numbers. Actually in 2007 just before working with Cevallos Zobrist seemed to be on a slight uptick in power over his previous numbers but afterwards the numbers are pretty amazing. Just taking into account his minor league hitting prowess and his slugging percentages from last year alone he seems to epitomize that potential that we were all looking for out of Corey Hart!
Here is another article that I found on Cevallos/Zobrist that goes into more detail regarding his numbers http://www.draysbay.com/2009/4/23/849233/cracking-the-zobrist-code-what-is