Recruiting within a 500 mile radius is a factor for Nebraska because those are the kids that are most likely to have an existing rooting interest in the program and/or may have a personal connection, but the overall importance is a little overstated. It's just one piece of the puzzle.
A (roughly) 500 mile radius includes Nebraska, Kansas, Iowa, Colorado, Missouri, Illinois, and Minnesota (as well as South Dakota). Realistically, we're looking at approximately 100 prospects worthy of a NU offer. An even smaller percentage of these are blue chip prospects - probably 35 or so. By my count, Nebraska picked up nine players from this recruiting region or 43% including two blue chip prospects. That is a greater percentage than any other recruiting territory in the country. Therefore, I think you could easily make the argument that NU made this a priority.
On the other hand, I think some of us would like to see NU make a bigger splash with some of the blue chip prospects in the Illinois and Missouri, where our highest ranked recruit in each of those states were #10 (Bryan Brokop) and #12 (Boe Wilson).
We've done very well in Colorado under Riley. In 2015, we got the #1 and #2 prospects and this year we signed the #2 and #3 prospects. If we were able to replicate this type of success in Kansas, Missouri, and Illinois it would have an impact on our overall team recruiting rankings. No easy task, but something worth shooting for.