coolant does raise waters boiling point, that and to make it less corrosive to internal parts, and for freezing temps.
your not supposed to use antifreeze when you go to drag strips and race tracks, a lot of teams use water with a additive that helps keep water temps in check, ice water or something like that its called. nascar does anyway.
and i've seen the crew freak out when coolant leaks happen on all out pinks.