Iíve read the reports about the new stains and sealers. My general policy still, is to let a new pressure treated deck set as is for a year before doing anything as far as a coating. This allows the boards to acclimate to their new environment.
In my experiences, acclimated wood takes stain and sealant better. In my environment (NE) the wood really doesnít do much in a year. Dryer climates may require less time, but basically letting the wood acclimate for awhile has proven a good strategy.