I would agree that some laps around the course on any bike help some with learning the layout, but there is no way it is a replacement for a race bike at race speeds. They can't do any suspension or gearing set up without the race bikes on the track gathering data. But we already know that Honda and Yamaha are ahead of the game with their bikes. Getting two days (3 for Bradl and MM) extra on the track with no traffic helps them even more.
2009 BMW R1200GS Adventure