Nova's title breaks the 'rule' that title-winning teams sign at least one top-20 class (according to ESPN, 247, and Rivals) in the four years leading up to their title. This was true for every title winner from 2003-2015. Of course Villanova does not come out of nowhere, and the rule can be adjusted to a top-25 class to take account of the new data point.
Some data on recruiting for Nova and ND:
BB Class Recruiting Rankings, 2012-2015: ESPN, Rivals, 247
Villanova
2012: no top 25, 22, 38
2013: 31, not top 20, 32
2014: 37, not top 30, 46
2015: 24, 22, 30
Average (among firm numbers only, rounded): 31
ND
2012: not top 25, 21, 28
2013: 17, not top 20, 15
2014: not top 25, not top 30, 56
2015: 39, not top 25, 45
Average (among firm numbers only, rounded): 32
What to make of this? Some thoughts:
(1) The breaking of this 'rule' is good news for ND, because we aren't recruiting at a level where it is effectively impossible to win a title, although of course the exception still proves the rule, and higher is better. But this raises doubts about academic/location explanations for Villanova's success relative to ND. Recruiting has not been obviously worse at ND.
(2) It is true that it is typically harder to get a top seed out of the ACC than the Big East. One rule that Nova's title does not break is that title-winning teams usually have (a) top-4 seeds in the year that they win (and low-seeded teams that win are almost always elite programs that had mediocre regular seasons, e.g. UConn in 2014) and (b) title winning teams have since 1985 had at least one top-4 seed in the tournaments leading up to their championship tournament.
(3) The Villanova administration gives their premier sport (basketball) the 'chance to succeed,' like ND (football). Of course, ND also gives most of its other sports the 'chance to succeed' (hockey, soccer, and lacrosse facilities are are top-notch, as I understand. Baseball was recently renovated, track and field is being renovated, etc. Not saying they are all perfect.) One exception, alas, is men's and women's basketball, where despite strong fan interest and relatively high levels of success, the practice facilities are relatively low-quality. Like many others here I plan to keep harping on this until we get what we want.
A note on the fan interest: I keep hearing how "nobody cares" about ND basketball, which is why the administration doesn't give it much attention. I went to most men's BB and a bunch of 'big' women's BB home games this year and the Joyce Center was typically 90-100% full. The student interest is not as good as it could be, but students are only one group here. So this line is false.