It's a fail to stop, regardless of speed. There are plenty of instances in which a suspect has deliberately evaded police and yet not driven particularly erratically. Granted, it would indicate they're less of a danger than someone doing 70 in a 30, taking corners at speed and using the wrong side of the road, but it doesn't change the fail to stop aspect and a police officer is going to have varying suspicions as to why that person has chosen to fail to stop, especially for 17 minutes.
No, because the police officers have no idea where his destination is or if he has one at all. Why on earth should they do things when convenient to someone who has shown disregard for the police already? Don't forget, the 'pursuit' lasted 17 minutes as it is, that seems more than reasonable a length of time given to allow him to stop of his own accord. Most fail to stops would see attempts to bring it to a close long before that.