While I lament that I cannot post photos of my son online (by mutual agreement with his mother/my better half on the off chance someone uses his image in a stock photo and we have no control over it), I just wanted to say the low light ability of this camera is amazing. Using ISO 12,800, I was able to get an absolutely adorable photo of him sleeping last night using the nifty fifty wide open (f/1.8) with the only light source a 4W light bulb behind a shade. Sure, it's noisy, but it's one we'll cherish when he gets older.
That's why I bought this camera. More than its blazing speed and the chance to improve my photography technique (which still needs a lot of improvement!), it was to capture the moments. This let me do it pretty much in the dark with a photo I wouldn't feel bad printing and putting in a photo album.
Who needs full frame? We have the 70D! 