It takes about 14-30 days of strict primal to get really used to this WOE, get rid of most non-primal cravings, etc. In that transition period, I'd say eat as much meat, veggies, fat, aka REAL FOOD as you want. (It helps that primal food is harder to overeat than CW food, but it certainly isn't impossible!)
BUT... along with that, it's also really important to re-evaluate your macros once you're sticking to real, primal foods, especially if weight loss is a goal. You may or may not be able to lose or feel awesome (or whatever your goal is) whilst eating "as much as you want."
My personal long-term goal is to eat real food at least 80% of the time. I eat when I'm hungry, don't eat when I'm not, and while eating, I slowly enjoy my food and pay attention to how full I am - I eat to a point of being satisfied, but not over-full.
re: bulletproof coffee.
a. it's not really bulletproof if you're putting sugar in it.
b. As far as I understand it, Dave Asprey's recommendation is to substitute breakfast with a bulletproof coffee, not to have one WITH breakfast. I could be misconstruing that, it's possible... but I personally will do JUST a bulletproof coffee most work mornings. On weekends, when I tend to wake up later (and hungrier) and make brunch, I'll have his upgraded beans with some grass-fed heavy cream instead of butter, or with less butter than if I were drinking the coffee alone.
hope that helps
