I would be interested in reading on this phenomena. I've heard this 10% before, but didn't find there to be much of a bump myself. The diet at no point was particularly difficult to stick to once I'd developed the initial discipline. I did find my strength performance to decrease after about 3 or 4 months, but I don't know if that's due to a particular hormonal shift, or being on a caloric deficit for an extended length of time, and a general decrease in mass making lifts harder.