Hello: Congratulations for the great product you have been building. It will soon be a great success.
I have tried the Demo, and checked in detail many of the administration features but I have seen that the responses are slow sometimes over 30 seconds!! I also bought the User Guide from the nopcommerce shop and it was slow too. Is that normal?
nopCommerce has always been lightning fast for me. Considerably faster than most shopping carts. Since it was being served from the nopcommerce site I suppose it's possible that their host could have been having some issues? If you download nopCommerce and run it, I think you'll find that it runs very fast!