When filling in the "Type to Find Users", it seems to sort by exact match and then by reputation when I am on the reputation tab.
For example, please consider the following search results:
This threw me off since I thought that the sort order is reputation. I guess this often might give people what they want, but when picking a popular name it shows a lot of 0 rep users. Maybe adding a filter for low rep to the exact match might give more expected results, or just sorting on rep?