I have some friendly acquaintances who are vet students that work at the Cornell Animal Hospital, and they both said that home testing, Purina DM canned and Lantus are now the general recommendations for newly diagnosed cats there by most vets/students. Unfortunately their web site is not as up to date as their treatment guidelines in the hospital. Also, those videos (and the vet school) are all sponsored by Purina, who sell the glucotest urine strips that they mention in the monitoring video and the prescription food. Purina dumps a LOT of money into Cornell which is greatly needed for scholarships and grants.
I don't want it to sound like I'm badmouthing them, because they are absolutely amazing there when it comes to treating serious or undiagnosed conditions, and I don't think they knowingly try to advocate treatments just to make money. But I think they can't update a lot of the info on their web site because their sponsorship obligates them to keep it there.