Ratings: Tree Hill Farewell Ticks Up, Happy Endings Finale Dips, Betty White Rocks for NBC

NBC this morning is saying “Prank you very much” to the 90 years young Betty White, whose hidden camera show gave the Peacock its (faint praise alert) best audience in the Wednesday lead-off slot in four months.

Specifically, Betty White’s Off Their Rockers drew 7.2 million total viewers (the time slot’s largest audience since Nov. 11’s Christmas in Rockefeller Center) while scoring a 1.8 rating (the best demo delivery since Jan. 11).

NBC newbie Best Friends Forever led out of that with 3.9 million total viewers and a 1.2 rating, improving on Are You There, Chelsea‘s finale audience by 26 percent but merely matching its predecessor’s demo performance.

Relive the Tree Hill Series Finale’s Best Moments – Plus: Mark Schwahn Thanks Fans

Of the night’s three finales, One Tree Hill wrapped its nine-year run with a two-hour average of 1.4 million total viewers and a 0.8 rating, up 4 and 14 percent week-to-week, Happy Endings closed its sophomore season with 3.7 mil and a 1.6 (down 10 and 16 percent), and the blink-and-you-missed-it Bent‘s season-ending double-header averaged 2.24 and a 0.8 (down 8 percent and a tenth).

Elsewhere on the night:

* American Idol led Wednesday this time around with 16.7 million total viewers and a 4.7 rating, down 7 and 11 percent week-to-week.

* Survivor (10.1 mil/2.7) dropped two tenths in the demo.

* Criminal Minds (11.23 mil/3.0) dipped 6 percent, while CSI (11.9 mil/2.9) gained 5 and 12 percent.