Notably, Urs Hölzles, Google's senior vice president of operations, responded to Manos, questioning whether banks were really stuck at a PUE of 2.0 for their datacenters: "With free cooling, following ASHRAE recommendations on cold aisle temps, hot air containment, and good UPS selection you can do *much* better than 2.0 with no compromise in reliability. So it's a myth that reliability and efficiency are in conflict. True, maybe you can't (yet) get bank-like reliability at a PUE of 1.2 but you can certainly reach 1.5."
Whatever the case, another one of Manos' key points stands: No two datacenters are created equal, and rather than leaving the development of datacenter efficiency guidelines in the hands of legislators, the industry needs a lobby group. The group's purpose would be to represent the interests of datacenter operators and to educate government bodies and regulatory agencies. The Green Grid, Manos notes, is forbidden by its charter to act in this capacity.
I concur with Manos that it would be in the datacenter industry's best interest to steer the feds away from regulations that are too restrictive (or too lax, for that matter) -- and rules that won't be based solely on PUE, which, in and of itself, isn't an overly reliable metric for measuring datacenter efficiency. Establishing such a group would, of course, require competing organizations to put aside self-interest for the greater good.