Is Leno’s mighty pillar starting to crumble? The perpetual king of late night ratings was just beaten for the very first time by Jimmy Kimmel, who “pulled ahead of NBC’s Tonight with Jay Leno in the key adults 18-49 demo (906,000 to 869,000).†Of course, if you’re using just the young people demographics it makes things easier, and Jon Stewart and Stephen Colbert are generally on top in those numbers anyways. But still! Good for Kimmel, and Poor Leno.