This is really the rub. Does this drive the value of a pass down, in a measurable way? Meaning, measurable by the honcho decision makers.
Maybe make em pay extra for a covid free line! ?
It's hard to say what the effect is, since it depends on the number of fast tracks users and how the lines are merged.
There's really no easy comparison to other ski areas, so I'll use amusement parks.
I go to Six Flags New England most often. All Six Flags parks use a skip the line system called The Flash Pass. It's a virtual queue that has 3 different tiers and the wait time reductions are based off the regular line. The lowest tier is 25% reduction, the second tier is 60%, and the highest tier is 90%, so if it's an hour wait in the plebe line, it reduces to 45, 24, and 6 minutes respectively. The way it works is you make a reservation on your phone. When it's your turn to ride, you show a bar code to the attendant and go right to the front. So not only is your wait time reduced, but you also don't have to wait in line. Since it's based on the regular line, it also limits the number of times Flash Pass users can skip, thus limiting the effect on the regular line. Most rides have a merge point with the regular line at the station, so you get to pick your seat like anyone else, and you're not taking someone's seat who's next to ride.
Cedar Fair parks have a system called Fast Lane. It's just a wristband that gives you unlimited access to the Fast Lane entrance at any included ride. There is no electronic reservation. This means your wait time is based on the number of Fast Lane users, rather than the wait time of the regular line. Like Flash Pass, there is a merge point, but unlike Flash Pass it alternates 50:50 with the regular line, so you don't get an almost immediate ride. In fact, if it's a super busy day with lots of Fast Lane users, you might have to wait upwards of 30 minutes.
I think the Six Flags system is better since it means that those who pay extra don't have to wait in line at all, but it doesn't have as much effect on the regular line, since it is based on that wait time.
The Powdr system will more closely resemble the Cedar Fair system. The biggest difference is that ski lifts operate at a far higher capacity than roller coasters do. One of Cedar Point's most popular roller coasters, Millennium Force, operates at a capacity of 1296 riders per hour. Killington's lowest capacity lift included on Fast Tracks is Skyeship at 1800. The highest capacity lift on the system is the Snowdon Six Express at 3000. That means shorter wait times to start with, and less effect on the regular line. That leaves the biggest variables as the number of users, and how the merge point works. If there's hardly any Fast Tracks users, then you might not see anyone go through the special line while you're waiting. If there are a lot of Fast Tracks users, and it's a 50:50 merge point, then that would dramatically increase the wait time for everyone else. There's also probably little to no effect on the singles line, since you are filling all the empty seats, regardless of which line the groups came out of.