It's unusual, but certainly not outside the realm of plausibility. I had a D3 team play into OT in 8 of 26 regular season games one year.
I do think the pace of play once one team is in quick shot mode needs addressed a little. Seems like teams are able to instantaneously cover the length of the floor with very little time coming off the clock to chuck up shots or track the opposing team down for intentional fouls, but the frequency of buzzer shots going in has never tripped an alarm in my head.