I think Reid was talking about a different stretch of river than the Lower Blue. Liquid Descents, as well as several other companies (Timberline Tours, AVA, Lakota, Up Tha Creek, etc.) run commercial trips on Gore Canyon.
For those of you who are unaware of it, the majority of the water in Gore Canyon on the Colorado River during the late summer season comes from Green Mountain Res. on the Blue. Gore is downstream of the Lower Blue. Water flows downstream. If any of this seems confusing, look at a map.
Most of the companies prefer not run commercial trips on Gore Canyon above 1300 cfs. If there is a lot of water coming from Green Mountain, and Gore is above 1300 cfs, commercial trips might have to be cancelled.
Sorry to put a damper on the potential flame war.