In review I found this answer to a question:
Before I answer I just want to let you know that I actually work for MetaVis so my post is a little biased :)
From a MetaVis perspective I can't tell you exactly what to expect as the tool relies on the internet connection that you are using. What I would recommend is downloading & installing MetaVis to figure out the average speed that you will get.
You can get a free trial here http://bit.ly/105Kkfq
Thanks and good luck!
I flagged the answer with a question but I still wonder what policy we have on this kind of links?