Saw this post yesterday and decided to give the technique a shot. After examining a Canadian $20 bill for a couple of minutes, I closed my eyes and pictured counting $100 in bills out physically, the way I used to do it when I worked in a bank ("Twenty, forty, sixty, eighty, one hundred"). I did this three or four times, then let it go.
Later that night I met my parents and uncle at a restaurant/live music venue for desert and drinks. During our conversation, my dad mentioned that he had some legal documents that needed to be dropped off at federal court on Monday, but that he wouldn't have time to do it. He then asked me if I would mind, and handed me an envelope containing the documents...and a $100 bill ($50 for the filing fee, and $50 pay for the "courier" - me). Not only that, but when we were settling the tab at the end of the evening, I was put in charge of physically counting out everyone's contribution to make sure it all added up- which totalled $100 in 20 dollar bills.
So I believe there is definitely something to this counting technique...now to try using it for a larger amount