Racer Ex is experienced enough to know when something's wrong
here's the point. You don't get 66tss/hr by just doing the type of ride you are doing. It would require either a lot of hammering or a race.
Although not as bad as inflating FTP and failing every single workout, using a low FTP is also bad b/c you think you can handle certain amount of intensity (i.e. IF), and at a future date when you plan a workout based on past experiences, in reality, you may actually fail to hit your targets.
and I don't buy for a second that you can't do a 20 min FTP workout as i've done plenty of 35-45 min long FTP sessions in Central Park, not to mention that if you set off northbound on 9W before stateline about 40 seconds after the light turns green, you can be at the top of State Line Hill and catch a green on that light and hammer all the way to Englewood without having to stop.