Thursday’s Glee-boot was a Nielsen winner. Per Nielsen, season four of Ryan Murphy’s weekly song-and-dance spectacular averaged 8.1 million viewers and, more importantly, averaged a 3.3 rating with viewers under 50 in its new post-X Factor home. That’s up nearly 25 percent from the show’s average last season, when it aired 8 p.m. on Tuesdays and had to kick off the night; it’s up about 10 percent from the show’s May season finale, which aired behind the performance finale of American Idol. What’s more, Glee actually outperformed its X lead-in among most key under-50 demo groups and (along with X Factor) trounced the finale of NBC’s America’s Got Talent in those same demo groups. Talent did beat both Glee and X in overall viewership (10.5 million), but the show scored it least-watched finale ever. Turns out Howard Stern wasn’t such a great investment after all, at least in terms of Nielsen payoff.