I have an UltraWebGrid that has around 1500 rows.  Whenever the users attempt to Multi-select the entire set of rows (selecting the first row, scrolling to the bottom of the grid, and then shift-clicking the last row), it takes a very long time.  I assume this is because of the client-side script that is running to select all the rows.  Is there anything that I can do to make this process faster?  I noticed if I run the row selection on the server side, the browser still takes a very long time to select all the records.