[mkgmap-dev] Nuvi routing performance

Playing with my shiny new Nuvi 255, I notice that it can route across an OSM map of the UK pretty well. It can find long routes reasonably quickly. In comparison, mapsource 6.13.6 often fails to determine a route at all and when it does it is rather slow about it. Do other people see good routing performance on the more recent Nuvis? Cheers, Mark