No. Skills have hardly anything to do with intelligence. You can learn to do certain things, and when you exercise enough, you can score very high. Intelligence doesn't work that way. It is a hardly variable part of you brain.
I think you're under valuing just how much intellect is required to make proper use of primitive survival skills.
Ever read Sagan's "Demon Haunted World"? He's got a chapter in there discussing one of the few remaining primitive tribes, in particular the skills they use tracking and hunting. I think it's the iKung, or something like that.
Something like tracking prey isn't just a matter of following the tracks. One of his examples is figuring out when an animal passed by from looking at it's tracks in relation to nearby shade. Hot African sun beating down, so the herd is going to change their course every so slightly to make use of available shade from trees.
To turn that into knowing when they passed though, you have to be able to work out where the shadow was, and when during the day it would've been there. Figuring out where the sun was requires geometry - not formalized, but it's the same basic principle. Turning that into a time requires a solid understanding of the variations in the seasons, as the suns location at any time in the day varies between different parts of the year.
Making the connection between the position of a track, the time of year and the time of day is not intuitively obvious. And this is only one of many techniques of a similar nature they use to survive. Each bit likely figured out by some primitive genius, and passed on - but understanding these and applying them is not equivalent to typing or running. The kind of intellect you need to make real use of these skills is more along the lines of understanding mathematics then simple rote memorization.
Well, except for the caveat that you don't generally stave to death if you fail to understand math.
So, don't underestimate the intelligence of primitives. That's not to say trust them with things they didn't need to understand, just to say that in their way, they made some remarkable feats of intelligence just to survive.