As one of your beloved "long-time fans", I honestly pretty much discount completely the games RIT played vs. NU in the 90's. NU was building a D-I team from scratch (and doing a very good job of it, btw) and just playing in the ECAC West as a pit stop on the way to where they really wanted to go. As would be expected, a very good RIT team went 2-0-1 against an NU team of all freshmen during their first season (96-97). The following season (97-98), NU's talent level became much more evident as they went 2-0-1 against RIT, including the ECAC West Championship game blowout. As a side note, two seasons later, NU made the D-I NCAA's and shocked the world by defeating UNH 5-1 in the first round. So years from now, when one may go back and re-trace the RIT-NU rivalry, those games should really just be a footnote.
On the other hand... Since RIT moved to D-I and the two teams began to play each other again (no games between the two between 98-99 and 04-05), the two schools made a point to play one another once per season every season despite being in different conferences (note the connection that both of NU's head coaches played at and won National Championships at RIT). Now they are geographically close rivals within the same "pod" of the AHA. So, IMHO, in recent history, RIT has developed a trend of not being able to beat NU. In only 6 seasons, NU is 6-0-2 against RIT. Now that they're going to be playing each other at least 3 times per season for the foreseeable future, it just becomes more and more imperative that RIT get that monkey off their back sooner than later.
I think it's far from meaningless, especially to the players on the team now. The Seniors are 0-4-2 against the Eagles while the Juniors are 0-4-1. I think they've noticed whether we talk about it or not.