This seems like too small a sample size to really conclude anything.
It is interesting to see the type of numbers the developers are seeing. They tend to be promising and I look forward to analysis as more and more users update and Lion is released.
That's why I felt that there is some general interest in publishing these numbers, as it gives other developers an idea of what level of sales is actually taking place on the Mac App Store. At least I find it interesting to know that ~100 units / day is enough for a solid position on the Top Paid list in the Graphics & Design category.