First 8 days of sales in the USA = 600.000 sold. Those are the number Nintendo guys are currently looking at, and I can imagine them sipping martinis with little umbrellas. That's over 80.000 per day, folks.
Sure, maybe the PS3 would also sell that many - IF they were actually able to make them. However, the brass at Sony can only ponder what may have been as they watch people spend their money happily on the competitor's product.
And, the more videos I see of it in action, the more fun it seems.