I'm not sure how you arrived at that. This guy's advice is generally good (division can be slow, even on modern desktop CPUs - particularly if a constant diviso

I'm not sure how you arrived at that. This guy's advice is generally good (division can be slow, even on modern desktop CPUs - particularly if a constant divisor is not available to the compiler), it's just his reasoning that's a bit flawed. More importantly he at least tried to test his reasoning than assuming it was correct (even though he didn't do so quite thoroughly enough). If he's managed to survive in a reasonably hard core industry for 20 years and his advice has at least some truth in it, then I'd say you're being a little harsh with that description.