I know recruiting rankings aren't perfect by a long shot, particularly on an individual player by player basis. That said, I think looking at the overall numbers over an era can give an idea as to the programs drawing power on the recruiting front.
Here are IU's total # of top 75 recruits landed during the different era's for which I have data. From 1983-1997, I'm only using Bob Gibbons and Clark Francis because that is all I can find and I can't go back at all past 1983.
1985-1992: IU landed 12 Top 75 players (8 year span) Knight
1993-2000: IU landed 11 Top 75 players (8 year span) Knight
2001-2007: IU landed 6 Top 75 players (7 year span) Davis, Sampson
2008-2015: IU landed 14 Top 75 players (8 year span) Crean
For those that say that turnover is greater today so it's not exactly apples to apples, IU ranked 10th in landing Top 75 recruits from 1983-2000 and ranks 13th in landing Top 75 recruits from 2008-2015.
The recruiting evidence suggests that the draw of IU has been more consistent than most think sans the Davis & Sampson years. Anyway... it's something more than just opinion.