Well yeah. You've all seen the pro's during the off-season, right? Fat, fat fat. Then they cut back down for the show. Why? Because it's easiest to gain as much mass as possible when you allow yourself to get fat like that. If you minimize fat gain, guess what? You could be minimizing muscle gain too.
I really don't buy this argument that if you take two guys, one of them "slow bulks" with a very small calorie surplus, while the other one bulks up quite a bit then cuts down when needed, that after a year or two years or even three years, the first guy will have the same amount of muscle as the second guy. Bull. The first guy will have significantly less lean mass, assuming the second guy doesn't diet down like a moron. Also, the second guy will probably be a whole lot stronger, since as we all know, you can build strength way, way easier on when you have a significant calorie surplus.
Okay, so some of you think that steve might be too extreme of an example, and dave gulledge probably has crazy genes, so.... I'll use myself as an example, since I'm pretty average sized, not huge or anything.
I know a guy around my height and age who has been training for quite a long time, but he is sooo scared of fat gain. He started around 170 lbs, and doesn't have abs showing. He is 'slow bulking' and is around like 190 or something now, I believe. Still no real abs showing.
I was 185 lbs in the beginning of 2005 when I started training seriously and I was "skinny fat", now I'm a ways over 200 and that's with abs showing. Hmm, slow bulking doesn't seem to be working for him, while long bulks and then cutting down is working great for me. Granted, maybe he partitions real bad. I'm naturally real lean, so maybe I partition real good. Okay, so assuming he has crap genes and mine are great, nope, that still doesn't add up. He has years of a head start on me, but I'm way ahead of him already? If slow bulking is so great, he should be carrying at least the same amount of lean mass as me, and I should be slightly fatter going by the theories.
Am I saying you have to walk around looking like an obese slob all year? No. At my biggest, I was around 225 lbs and people didn't even think I looked fat. Now I'm pretty new to the game still, so I may not be the best example, but I was able to gain a lot of lean mass by bulking up for a long time, got somewhat fat, and hey, I didn't die from it or any of the other horrible things that are supposed to happen.
But you know, maybe my point of view is skewed, since bulking is harder than cutting for me. I think fat is easy to cut away, as long as you have the determination, willpower and patience.