Citation? I've seen math that all LED bulbs provide a better return in saved energy costs over the S&P500.

Better return compared to incandescent, but a worse return compared to CFL.

Comparing to incandescent is quite disingenuous. The bulbs just cost too much today, and the heat problems (i.e. much lower lifetime) are not fully solved, they work in some fixtures and not in others.

Cree LEDs have a 20 year lifetime, and a 10-year limited warranty.

They cost a lot though, which was my original point, that they are not financially worth it (yet).

I don't know -- I just picked up a screw in LED bulb from Walmart for just over a couple bucks, about the same price as CFL. And I was surprised at how bright it was. Just wondering how long the electronics in it will last.

Those cheap LEDs have a CRI of around 80, you can get a CFL with that low of a CRI for under a dollar.

The LED has no advantages over the CFL, just extra cost, with no benefit.

LEDs turn on instantly, CFLs take a moment and get slower as time goes by. If I break a CFL I'm potentially exposing myself and my child to mercury vapor, not so with LED. Those are both benefits I appreciate.

CFL's turn on instantly unless they are in freezing weather. If yours don't then get better ones - walmart has really good ones.

The mercury vapor in CFLs is not very dangerous, it's elemental mercury which is not especially toxic, you need continuous exposure over a long time for it to cause any problems. One CFL is not going to do anything bad. How many CFLs do you break anyway? I've never broken a hot one, only a cold one that fell of the shelf, and cold ones don't release any mercury at all.

Buying an LED is an easier sell these days since the price has gone down, and the brightness has gone up, but I hope you did not avoid CFLs before now - that would have been very shortsighted.