I wouldn't exactly call it a "favourite" among any organisations. In my mind, it's simply that large companies consider it a big effort to upgrade everyone to IE7 (or in fact IE8 now that it's recently been released). It's a benefit versus cost decision that many executives seem to think has the simple answer that it just doesn't matter to the business. This may even be the truth in many cases if there's no system set up for automatically upgrading the (possibly vast number of) computers on the network. Many people (including myself) would argue having even a moderately decent browser (i.e. IE7 onwards, Firefox, or Safari) is would be a worthwhile thing for any business. The fact that IE8 has just been released, which now makes IE6 outdated by two versions is certainly going to encourage companies to start upgrading. The problem here is that as long as there's a significant market share for IE6, the vast majority of web designers are going to keep on designing sites to be compatible with IE6, regardless of it's poorness as a browser. Finally, if you're really keen on getting everyone to upgrade from IE6, I ought to point you to the Stop living in the past website. Perhaps if you campaign strongly enough within your organisation, you may just convince the people who make the decisions to upgrade, though I wouldn't like to bet on it...
