Greetings. I have an Excel 2007 spreadsheet that contains a large amount of
data (about 40,000 rows of the stuff).

I was wondering if Excel 2007 will slow down considering (or other problems
will arise) if I insert a large number (over 5,000) grouping of various rows
(Data | Grouping | etc.)? For example, MS Word 2007 slows down and gets kind
of cranky if the file gets two large or complicated.

My question then is this (and I wish I could here an answer directly from
the horse's mouth -- Microsoft -- hence, the incredible value of the MVPs
that help us here in these forums): are there recommendations or warnings
about using too many data groupings? And if yes, how many are too many?

P.s.: my computer has a lot of RAM and a powerful CPU, so ...