If it is 'shopped, it's a very, very, very good job. I saved the image full sized and blew it up 800%. There is no break in the pixel continuity between the logo and the white parts of the tail, where one would most suspect a 'shop job.
Although, the Giants denied having a private plane, so, who knows. I'm no Photoshop CSI, but I have stayed at a Holiday Inn.