I guess it was until before the major relaunch you did last year that the default sorting of tasks, at least in the "today" folder was by priority. I always group by context and below that the higest priority was laways listed first. No it seems to be sorted by the date of the task. I would love to have to sorting by priority back, because you always notice those tasks first that are at the top of the list and if that's where high priority is, it's so to say fully automated to recognize their high priority.