You could rule this, but by RAW, ranks in Wall-Crawling don't mention an increase of your speed, just a higher chance to climb a particular slick surface... a problem Flight doesn't have and it specifically lists sample speeds... or should the speed be the same for Wall-Crawling?
Wall-Crawling 7 = climbing with Mach 1 but moving normal if running?
I read it as the power gives no speed increase. You have to get Super-Speed with Surface Speed as bonus power, which allows both running up walls
and over water.
and Happy Holidays