[batterseapower]

Do they actually claim that? Their page claims that 50% of household energy usage is governed by the thermostat, but they are very careful to avoid any specific claims about how much Nest would reduce this usage.

[aik]

http://www.nest.com/living-with-nest/index.html

$173 in savings in 12 months on an average annual energy bill of $2200.

12.7% in savings over 12 months.

[Maakuth]

That is correct. Pardon for referring it incorrectly.