Not even close. The Yankees won a WS in 2009, have only missed the playoffs 4 times since then and have won a bunch of playoff series. Not only have the Cowboys not won a title since 1995, they've only won 5 playoff games since then. For comparison, the Titans have won that many playoff games since 2002.
I totally get how the Cowboys became super marketable during the 90s, and I guess I can see how that inertia continued into the 2000s. It is astonishing to me how they've continued to be such a big draw (I'm meaning nationally, outside of Dallas) since then though.