The [Indian] appearances were long enough to be noticeable. Apparently typical Andean Indians with the hats and all, doing typical village activities in the village. Not much interaction with the characters. Nothing at all on the lines of the spearchuckers from the Indiana Jones movie. i.e. they looked authentic to me, and were acting normal.
For more on A Quantum of Solace, see Embera Extras in Bond Movie and Bond Film Included Inca. For more on the subject in general, see The Best Indian Movies.