User blog comment:Kirkburn/Technical Update: January 7, 2014/@comment-5558012-20140107183532/@comment-5706853-20140107202828

I agree that it would be much better to have the option to choose how long to highlight threads for - when I highlight threads I generally leave them highlighted for at least a month.

If you have to specify a particular time frame maybe make it a month or two - but a week is far too short a time.