Cost to GDP of the 2013 Fiscal Cliff Deal

Here is what I've come across so far in terms of what the deal will do to US growth in 2013:

Feroli (JPM) says growth will be hit by 1%
Rosenberg (Gluskin Sheff) thinks it will be 1.5%
Goldman Sachs says 1.3%
Kit Juckes (SocGen) oddly sees the deal adding 0.5% to GDP. Perhaps this is from a baseline of a fiscal cliff occurring.

In summary, US GDP should struggle in 2013, coming in around 1.0% - 1.5%.

UPDATE: Chicago Fed Charles Evans sees US growth at 2.5% for 2013