I don't see how "Numbers" is any more intuitive than "Calc", not that Calc is really a good name for a spreadsheet application, but at least it makes sense. Spreadsheets do calculate things, it's just the name collision with the Windows app calc and the fact most people associate calculating with, well a calculator. Calc may be a poor name for a spreadsheet app but Numbers is definitely worse.
> I don't see how "Numbers" is any more intuitive than "Calc"
In an office, ask a bookkeeper, sales manager, whomever, "Hey, show me the numbers!", and you're going to see a spreadsheet. If you ask, "Hey, show me the calc!", you'll get a blank look.
Evidence suggests "Numbers" is a perfectly cromulent word.
Where I've worked, you'd be more likely to see a spreadsheet poorly pasted into a PowerPoint presentation with a poorly scaled bitmap of a logo in the corner that is a 6 MiB attachment to an email...