Unfortunately, this is a very hard problem to fix. There are many different factors involved that make it difficult to figure out why it is slow. For example, for me loading takes around 45 seconds to a minute in linux. For others it takes a couple of minutes and in your case takes much longer. So it is hard to know when we have it \'right\'.
All I can say is that we will continue to work in this area and hope that things get better as we go.