I have two things to add to this thread. Not all QHs move the same so just comparing her to one QH is not a good way to go. I see nothing special in the way she moves anyway.
It is probably a hundred times more likely that she is crossed with a QH or TB than an Andalusian. There probably aren't as many Andy's in the world as there are Quarter Horses and most of them are not in this country. The horse you have is the horse you have regardless of what her DNA says she is.
There's nothing like the Rockies in the springtime... Nothing like the freedom in the air... And there ain't nothing better than draggin calves to the fire and there's nothing like the smell of burning hair. -Brenn Hill