IIRC from early previews, the Scots unit roster is summarised as being a mixture of Norman-style, conventional feudal European "lowland" units and "dangerous but unreliable" Gaelic highlanders. As far as I know the basic highland/lowland distinction is fairly accurate, but the depictions of the highlanders especially are likely to be fancifully romantic and primitive, influenced by Braveheart etc.
I'd certainly like to see their unit list as I'd quite like to play as them, although I suppose there's a stronger argument for more Eastern or Islamic factions before things like Scotland. I hope they will be interesting though, especially the Gaelic units should make them less of a generic western European faction.
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