Daaamn...I was about to say I've never hit terrain that bad, but apparently I did one day on Lover's at 62:14/km around the main active quarry. I'd imagine the JFNP version was a lot less fun.
Not a reflection of the vegetation thickness. More to do with complexity of features and the slow decision making process. Slower than usual as I first try and establish what was I was thinking in the previous version. Some times brilliant but more often just too many features mapped.