IE10 seemed nice and quick and stable so I thought I'd take the offer of the upgrade to IE11.
It doesn't seem to do an awful lot that's different.
It does however crash on every page with a Disqus discussion thread.
And something - I think it might be Disqus - has left what looks like developer's debugging code in instead of removing it when the site went to production.
Resulting in the amusing message "Scanstyles does nothing in Opera/Firefox/Webkit" or similar appearing in a pop up box on some sites - the Telegraph home page always does this.
Finally, it is noticeably slower, and has a tendency to pause for no explainable reason when finishing rendering larger pages.
Don't do it yet