That's not true. Most of the casual fans, especially in New York, picked the Yankees as World Series contenders after the Tanaka signing. Unfortunately, like the Jays of last year, the Yankees have gaping holes to be fixed, even moreso than the Jays in 2013, with holes at 2B, a decent SS (Jeter's a DH at best), 3B, and the bullpen behind David Robertson, if he can survive being the closer.
Tex needs to stay healthy as well, but rumour has it his wrist is acting up already, and he may not be ready for Opening Day, as according to MLB.com’s Yankees beat writer Bryan Hoch, Teixeira is still experiencing a bit of stiffness in his surgically repaired wrist while swinging off a tee and continued strengthening exercise. Not a good sign, especially considering he's basically the cleanup hitter now with A-Rod and Cano gone.
They also need Sabathia and Kuroda to rebound as well.
Look, unlike Boston and Tampa, the Yankees are far from sure things. Even ESPN is calling them a 4th place team after the Tanaka signing, behind Boston, Tampa and Toronto, as Baltimore is likely a last place team as constructed presently.