I can't give you an objective measurement, I talked to the fellow at ZFC about getting some testing done but his price for testing a few formulations would totally blow my budget. I'm thinking about building my own test rig but I have a few other things on my plate.*

I have some people doing some beta testing but no results yet.

* You may know I have been running a small business developing technology for the wine industry. I now have two partners and we have just been taken on by Australia's premier distributor of winery equipment so life may be about to get very busy, especially with the triennial Wine Indusry Technical Conference in a couple of weeks.