Improve scrolling behavior when PageDown/PageUp keys are used to scroll rows

In Question ID: CQ54130 I asked:
I have a grid bound to a paged data source that has (say) 50,000 records. When the user presses and holds the 'PageDown' key, the grid asks for every page as it scrolls (which causes a lot of DB activity). I would like to be able to have the grid not ask for every page along the way but to only ask for the page when the user releases the 'PageDown' key (but the scroll bar should still move). I have not been able to figure out a way to do this.
It was suggested that we use the LiveVertScroll property but we already use this property and it does not work for PageUp/PageDown. When I drag the thumb from the top to the bottom, the grid requests one page (the last one). But if I press and hold the PageDown key, the grid requests every page.
This behavior was described as "by design" but I should enter a separate suggestion to get this behavior considered for a future release.
Proposed Solution:
It makes sense that LiveVertScroll would work with PageUp/PageDown but it doesn't. I would like multiple PageDown presses (less than 250ms between each keypress) to request only the last page.