Evee....I'm not going to sit here and say that it's not difficult and a lot of work for a T1 to maintain a fairly steady BG, but if Dr. Bernstein as a T1 can achieve it and expects his T1 patients to as well, I can't agree that it's an impossibility to do so; it's not always a piece of cake (no pun intended) for a T2 to keep a steady blood sugar, either. Difficult? Absolutely. Requires a doctor who will work with you and find the right types and amounts of insulin as well as the correct injection schedule to match what you eat? Absolutely. Requires changes in what and when you eat as well as rethinking and changing what you've probably been doing for a long time? Again...most likely yes. The ADA states that "tight control" isn't for everyone and on that point I have to disagree with Dr. Bernstein. Not because it's impossible, but because many people find that achieving that is more trouble than they believe it is worth.
You're right...as a T2, I can't completely relate to what a T1 goes through on a day to day basis and because of that I can only rely on what people like Dr. Bernstein have to say about it: http://www.diabetes-book.com/book/chapter7.shtml
http://www.diabetesincontrol.com/drbernstein/ask.shtml
Ultimately, we all have to decide for ourselves how achievable the goals that Dr. Bernstein sets are for us as indiviuals and to what lengths we are willing to go to achieve them. I can't set blood sugar targets for you, knowing very little about your diet and lifestyle any more than you could set them for me. I do still firmly believe that the closer we can come to achieving the targets that Dr. B sets (T1 and T2), the better off we will be in the long run.