We did this a couple of times before and you can see the differences in the drawing. To me this is pretty spectacular because I don't feel myself changing on a day to day basis, even though I am. Being the geek that I am, I produced some evidence.
My pencil drawings are supposed to be symmetrical and stop at the fold in the paper that I indicated with a black line. Clearly, advanced Photoshop skills were used for this manipulation. In February 2011 I obviously transgressed that line due to bad eye positioning. Today the result was much better.
Last but not least, I got a new toy to play with at home called an Aperture Rule. It's not just for little girls but I'm pretty sure she is better at it than I am at this point :)