Do they? That's been a sticking point for many regarding this big push to build more. Evaporative is cheaper and these companies aren't going to spend more if they don't have to.
There's a cost either way (electricity or water), but electricity is much easier to get to your data centre so the capex cost at the start is lower, and municipalities have this annoying tendency to ban cooling towers because they're not pretty enough.
What misinformation?