Update Oct 11, 2013: I’ve been given the “all clear” by Microsoft and from readers that as of this week, Excel 2013 Standalone DOES include and successfully install Power Pivot!
See this post for details.
After a few readers of last week’s post reported that installing Standalone did NOT add Power Pivot and Power View, we followed up with my contacts at Microsoft.
Microsoft quickly tracked down a problem in the upgrade logic, and it will be fixed in the September 10th update (that gets automatically downloaded). So hold tight until then.