This is pure speculation on my part, but the impression I get from hearing Glenn talk about this album is that it is important to him personally and that he recorded it for himself and for his parents. I don't get the feeling that he considers it to be of great importance or magnitude in his professional career and doesn't expect it to be a huge commercial success. That's not to say that he doesn't care about it or isn't proud of it, but I think he views this more of a personal achievement than a professional one. Having said that, I'm sure he will be pleased if it sells well, but I don't believe that was his motivation for recording the album.