Without the alpha links, you can see just under 10 apps at once. If you have <= 40 apps, that's at most, 4 "screens" worth. You can scroll very rapidly through the list. To click A, then S, then Spotify, might take longer than a flick up that scrolls you to the bottom and you click Spotify. Again, it's personal preference. I LOOOOVE touching my screen with gestures much more than point and poke motions, but that's just me. I love to caress my 920.
If anything, it'd make sense to ADD those jump links to the Games list, which is a little confusing, as it's sort of "arbitrarily" listed as "Recent", then "Microsoft/XBOX" titles and then all the rest. I find myself scrolling through that list all the time trying to find games, where a single list with Jump links would definitely speed things up.