Nope, because if you look closely those nights Idol was on in that slot are highlighted in blue and 24's numbers are in orange, so those are 24's real averages.
No. You missed the context of the statement. We're talking about viewer patterns rather than just the numbers itself. The 2 straight weeks of American Idol on Tues was a smart move by FOX because it pulled those viewers away from other networks those weeks. That increases the odds those viewers will tune into that time slot on FOX the next week.