Pretty mental. I watched Fiji school Uruguay 68-7 just last November. It has been great watching Uruguay recently, they have talent in the half backs and a handy winger, but the rest is all about heart and execution.
I've said it before that they have been the best drilled / prepared Tier2/3 side of the last couple of years. They get the maximum out of what resources they have like no other union.
Being a small and not particularly wealthy country we have to be realistic about what they can achieve long term (although plans for a South American pro-league are I believe still ongoing), so let's just applaud them for an outstanding result on the biggest stage and hope if puts a few more much needed bums on seats at their home matches in the future.