Quote Originally Posted by Photo-John
I do this all the time. And as the article points out, we used to do it all the time with film. I would regularly push ISO 400 film to 800 or ISO 1600 to 3200. Use all the tools you have at your disposal. There's no such thing as cheating. In my opinion, there's no honor is puttng the label, "No Photoshop," next to a photo. That just means you let a camera engineer decide how your photo looks.
Exactly, your only "cheating" yourself by not using the tools available to us.
As for the push and pull techniques, these were very useful in the days of film where you could not switch to a higher iso when the light went down. you had to have a bunch of cameras around your shoulder with different iso film in each.
One of the greatest advantages of digital is ISO on the fly. When the light goes down, switch up to a higher iso. The sensors and cameras today offer great results at high iso. When you look through the images on your screen, you can then adjust the exposure to perfection with especially good results in RAW.