One reason to wait until year end to take your distribution for 2012 in one big lump is to let the money continue to grow tax-deferred as long as possible.
Nor do they have another feature that makes IRA to Roth IRA conversions easier to stomach: the ability to undo the conversion in the following calendar year if you change your mind (say your stocks take a big hit).
Are you going to ask for it to be raised big enough to the point where you get to the year where in your budget you get to primary balance, which I think is 2017 -- which is a zero deficit -- running zero yearly deficits?
If widget-based ads are your thing, you might want to hold off until the big manufacturer roll-out next year, or you could always consider that Google option.