Move along now. Nothing to see here.
"One problem: the aforementioned data, gathered by Net Applications, counts browsers running on Joe Netizen's PC. It doesn't count enterprise users."
That's open to several readings, one of which is "this data counts internet usage, not intranet usage". But it does not matter if people are still using IE6-based applications on an intranet. What matters is that they use use a different browser to surf the web.
That "different browser" can't be a later version of IE but every other browser *can* be installed side-by-side with IE6 so actually that's Microsoft's problem not the corporates'. Having installed a different browser, enforcement of its use is probably also something that a competent corporate admin can enforce and, on the Net Applications evidence, they are doing so.
So the bottom lines are:
IE6's share of the *browser* market is below 1%.
It is safe for web page authors to drop all support for IE6.