Actually, you aren't lucky for the most part of it.

Most CH-5 will work with 2/x/2/2 timings on Nforce 2 motherboards at some speed, no matter if they are bad or not. You just got two better modules that will handle a nice speed. Still if you use them on most other motherboards using other chipsets, they won't take any timings lower than 2/6/3/2, not over 200MHz anyway.

The Nforce 2/3 ability to run CH-5 modules at 2/6/2/2 timings is considered a bug by some people, my sick self included, since the change from 3 to 2 barely affects performance while using BH-5 chips does have a great impact.

BH-5/6 @ 2/6/2/2
CH-5 @ 2/6/2/2
CH-5 @ 2/6/3/2
BH-5/6 @ 2/6/3/2