I have a variety of sumproducts that are pulling from a large (30K row)
range from a second sheet. I'm wondering whether it would make any
difference if I made the range a named range instead; the key benefit I see
is that I could dynamically change the size of the range (Bullen's
autoexpanding named range) so that I'm not using my formulas against a
larger (conservatively estimated) range.

If I do that, will pulling this data into a sumproduct as a named range vs a
direct sheet reference make any speed difference?

Thanks,
Keith