Erik,
do you have an organizational account or a a free account?
With an organizational account you can upload a tiled feature service, which would cache your polygons and improve the performance tremendously.
Tim
I tried using the tile service. Unfortunately the problem I have with it being a large shapefile with lots of polygons (thus drawing slowly) also means that with the tiling service it would require lots of credits (analyze function tells me it would exceed credits by 3,570%. We're a non profit, so we don't have a budget for purchasing credits. Any other suggestions to speed up the display/draw time?
Thanks,
Erik