Well, 135g of carbs is still kind of a lot -- I'm not going as low as Bernstein, but I'm trying to keep my carbs to 50 - 60g a day. Which has helped with swings, both high and low. Every once in a while I cheat, and pay the consequences. But when I'm good, I do reasonably well at staying under 140 (not always, of course, but frequently). Whereas when I was eating more carbs, I was almost never below 200 after meals (and when I was bingeing on carbs, I went over 600, but let's not talk about that!). Keep on experimenting and see what works for you!