the delay in downloading the posters is a very time consuming process normally for any plugin and is totally dependent on from where its downloaded - once you have the information.
I should have said that the new updated serviceapp (which will not be available for a few days or so, as I have only just posted the update) is really much faster and I think when you have a chance to test that will be the best choice.
An alternative in the meantime is just to go to plugins and remove servicehisiliucon from the system plugins, you should find the alternative (servicemp3) better.