Yes. We add sulfuric acid to water, because it's greater density causes it to sink, and the heat generated, at the interface, when it first hits, gets conducted to the surrounding water. We'd expect, if we just sprinkled water onto sulfuric acid, the water to float, for nanoseconds, then become very hot, then boil. That would splash the water, and acid around, and could hit someone. Of course, whether you add acid to water or water to acid, the total energy released is the same, but you knew that, right?