Fire density penalty

[Stejones82]

Please help me understand this mo' better:

As I understand the rules, if you have more than 10 men in one hex, a fire density penalty comes into effect that will benefit incoming fire (produce more casualties or increase the likelihood of more casualties).

And this penalty applies to total number of men and is not affected by the number of unit counters. For example a stack of five 2-man bazooka teams does NOT trigger the fire density penalty, but just one 12-man rifle squad DOES merit the penalty.

Am I even close to correct?