Don't listen to this nonsense, pick a lens based on what sort of conditions you encounter most often. Most of the Iridiums are for pretty bright conditions, the Fire , Black and Gold probably being best for relly bright blue bird days...the Persimmon are a good all around lense, can be ridden in alot of lighting and they work decent in most, there is also a High Intensity Persimmon that I've heard s really nice. If you do alot of low light/flat light and night riding, look into something like the High Intensity Yellow, or something that has more light transmission otherwise you won't be able to see much. Check out this link for more info on lens tints and uses:
http://oakley.com/technology/lens_tints/