Good Calories, Bad Calories

I've been reading Good Calories, Bad Calories, by Gary Taubes.  I'd heard a lot about it.  Now, I have a lot of vegan cookbooks.  I've been eating mostly vegetarian for years, and have been on the low-fat train for decades.  However, I like to keep my options open. I visit Mark's Daily Apple and recently borrowed The Primal Blueprint from the library.
While I don't think carbohydrates are evil, and I wonder about the sense it makes to eat like a caveman when cavemen didn't live very long, it got me thinking.  The two sides are so polar.  Both have studies that support their views and both are very vocal (The China Study, and some of Atkins' work).  And you've got followers in both camps that say they've never felt better, been healthier, or been able to maintain their weights easily.  Of course, that's probably easy when you are eliminating entire food groups.  And both sides really emphasize lots of fresh fruits and veggies and real food. I read lots of vegan blogs. However, I've got some friends who have had much success on a health standpoint by going low-carb.
I'm not sure I could ever give up my grains, but I have been cutting back.  And the last several days, I have been increasing my fat intake.  (It's that Good Calories, Bad Calories thing again.)  That whole low-fat diet thing?  Total hoax.  No definitive studies that ACTUALLY link a high-fat diet to cardiovascular disease.  At least, I'm about 1/3 of the way through the book, and that's still the case.

Today I woke up with a killer hangover.  Gave blood last week, then had 3 glasses of wine = not a good mix.  For breakfast, I ate high fat (remembering what worked during my college days).  2 eggs, a piece of toast with butter, and cheese.  I wasn't hungry for 6 hours, when usually I need to eat every 3 hours.  I decided to continue the trend for lunch, and got a Cobb salad.  Only 440 calories (Trader Joe's), but a lot of fat.  Again, did not need an afternoon snack.
Dinner was a slice of homemade pizza and some broccoli.  All in all, I haven't been hungry today, and I only ate 32 points.  Which is pretty low for me.
So, I'm going to be testing out this higher-fat thing for a bit longer.  See how it works out for  me.  Nuts, avocados, seeds, eggs, meats...if it  helps me maintain my weight without hunger, it can only be a good thing.
Have you read Good Calories, Bad Calories or The Primal Blueprint?  Any thoughts?