I have the same problem with you shyster, because it seems that every time I'm flipping over a "new" card it takes about a second or so to load and flip over. Then it takes another half a second (if you're wrong) for both to flip back over. I don't see how anyone could be making 15 gran a day without getting extremely aggravated and taking literally hours of practice to even get close to mastering.
The one time I didn manage to complete it on 3 stars on intermediate left me with one turn and 2 seconds left. I was relieved because I had tried several times just to get to that point.
Every time I close the window to Alteil, I believe the computer has to re-load those same images so I imagine I'll be repeating this process every day unless something changes.