I haven't read that, so I can't verify. I've been getting fine results in recovery from my 2.5 scoops of Surge immediately post-workout. I did some experimenting with 2 scoop during the workout, and 1 scoop after, but I feel better taking the whole thing afterwards. Surge was designed specifically to do a job. Taking it as directed seems to make sense, to me. If mixing a scoop of Surge with a scoop of whey was outstandingly better, I'm sure it would've been made that way originally.
"Too fatty" is a very vague and misleading term. Technically, both choices are low in fat content. However, the Metabolic Drive bars are more calorically dense, offer more fiber, carbs, and total calories (compared to a single scoop of Metabolic Drive powder). As long as you calculate the calories into your daily totaly, you should have no trouble eating as many as you want.
With that said, however, I generally try to limit myself to no more than 2 bars per day, and/or a total of 4 or 5 scoops of protein powder. It's pretty much a personal choice, but I want to be sure to get in an adequate amount of whole food.