I linked to those pictures because they're places around where I live that demonstrate that mountain ranges can be rocky.
Again, how rocky/smooth mountains and terrain around them are depends entirely upon the age, composition, and origin of the mountains in question - but rocky mountains are not unrealistic. "Everyday" I wake up and see my mountains, which are very rocky. There's really no such thing as "normal" mountain ranges - there are different types all over. That pic you showed looks not quite as bad as one I linked to, which shows people standing on a little peak off the side of a mountain.
The city I live in sits alongside a mountain range on one side, and plains on the other. The city is built around hills and ridges similar to ones we see in the game. I wish it wasn't - I cycle to work!
I tried again to chase some mountain bandits into the mountains for a skirmish:
For some reason, they wouldn't go any higher - I chased 'em back and forth, but this is as high up the mountain as they would go.
Start of the battle - my men spawned in a snug little valley between two slopes.
Mounted mountain bandits came from the other side of this hill . . .
The battle's nearly over - this pic looks like one of the ones I posted earlier.
We won (no losses - had to gloat a little there), and I went up to the peak in the last pic to look out over the battlefield. This does not at all look extreme. It looks like one of the valleys between mountains here at home.
Finally, here's a link to a pic of a mountain a couple of hours from here - even the bottom half of the mountain is rocky, with steep slopes everywhere:
http://outdoors.coloradosprings.com/traildetails.php?id=92#
@Mr. Colada
I was the one with the specific examples from here in Colorado - and they're quite common on this mountain range, at least (the largest in North America). Sure it doesn't take place in Colorado - it takes place in an imaginary world dreamed up by Armagan . . . so why are we having this "realistic/unrealistic" argument about a work of fiction? My point is that the mountainous region is not unrealistic - there are plenty of examples in my backyard.
This whole thing is a matter of opinion - do you think the game pics I posted are extreme? I don't.