TexasCHLforum.com

I'm not an instructor but I'll stick my oar in on this one anyway.

Three decades shooting in USPSA competition formulates two rules of thumb relevant to this issue.

1) compete with what you carry/carry what you compete with to the greatest extent possible.
2) the lower levels of shooters will not gain much (in some cases, just the reverse) by the addition of dots/holo's. Timed fire is about technique, not sighting systems. In IPSC speak; "no competitive advantage gained" for the bottom layer. For the guys above them, they were going to pass the qual anyway.
If DPS wants to be passive aggressive about it, they can OK using glass with a shorter time limit.