I'm the one who placed the original post, and I wish to thank all who participated.  I've learned quite a bit.   I've read Hellen Rennie's blog (http://www.beyondsalmon.com/2011/06/why-sous-vide-sucks.html, but she's not knocking SV), in which she posits that many people are cooking sous vide meats much too long, which leads to a greater loss of juice and, perhaps, loss of flavor.  She's proposing to SV generally at 130F (54.5C) for only about one hour (varies shoewhat by meat cut).  She offers well-researched evidence for it.   Also, I read a technical paper on why the use of a Jaccard tool helps to make meat juicier, which appears to be counter-intuitive.   I wonder if some of the more experienced SVers might be able to expand on this.  Thank you.   George Bedford, TX