Sons of Anarchy isn't taking its hand off the throttle.The FX biker drama has been averaging around 4 million viewers all season, but Tuesday's episode — which pulled in 3.7 million viewers to handily win the night among cable channels — was competitive with the major networks in the adults 18-49 demographic. More significantly, Sons' 2.2 rating outperformed both The Jay Leno Show (1.8) and ABC's The Forgotten (2.0) in the demo.NBC stands behind Leno's numbers. "The Jay Leno Show continues to top our expectations," a network spokesman told us. "And, as always, we are looking at this on a 52-week basis."