Of course, since 1.7 it looks more like this, in any given seed:
(Note that even though there were more caves before 1.7 there was also more variation, and ironically, more large areas with few caves, just as there were areas with an extremely high concentration of caves)
As for the "increased variation" I mentioned, imagine finding caves and ravines like these (the last screenshot is a real vanilla cave, from the seed -123775873255737467 at -800, -1050; of course, only before 1.7, and while extreme it is the only cave system that large and dense in the entire world mentioned above, as shown on this map of the lowest 20 layers, located near the upper-right:
You truly live up to your username. You not only supported this, but you even put in proof most wouldn't/couldn't!