I think most people are not doing cross country drives and can predominantly use 1 dvd and benefit from less errors and more data.

Having said that, I have a 2008 and am clearly having issues with this 2010 dvd being a lot slower to load and refresh than my old 2008 dvd. Just this morning it took almost 2 minutes for the directions to pull up and then it would freeze in the middle and not reflect where my car was moving towards when I had turned.

No issues with my old 2008.

Perhaps it's bad weather? It might be a problem communicating via satellite? It's been terrible weather here the past week.