When I right click on a sheet and select "copy" and copy the sheet to another
workbook it takes Excel nearly 30-60 seconds to complete the operation.

The sheet being copied contains only data, about 15 columns x 400 rows.

This behavior is exhibited when copying from workbooks that are in the new
and old file formats.

I have a new Intel Duo-Core 2.66Ghz and 3Gb RAM.

Any suggestions would be appreciated.