Kanonen is a pretty good example of having some decent forces with only 2 tube track. Just using the track style as an indicator of how intense the ride will be is not the most accurate way to do it.
However, based on the banking of the track on the first section, it doesn't seem to be very intense, but that's fine since we still have the entire rest of the ride to look forward to. If you ask me, a good coaster doesn't need to start off super strong, but rather progressively build it's way up throughout the experience.