Request map in tiles for dynamic service

ArcGIS Explorer breaks its requests for map services into 512x512 tiles. This makes it feel like the data loads faster. Another difference is it starts requesting tiles as you pan (with mouse button held down) instead of waiting for you to release the mouse and make a single request for the new bounding box.

Is there any way to make the flex viewer do tiled requests for dynamic ArcGIS map services like ArcGIS explorer does?