Just how exhausting is a study?

I recently posted about an exhaustive study of twitter users and it reminded me of another pair of words that can be misused.

exhaustive: covered all angles and possibilities
The SES conducted an exhaustive search of the area but found no traces of the girl.

exhausting: to use or consume entirely, to drain or tire
The two day Problogger event was exhausting so I slept in the next day.

I don’t think exhaustive is used very often now; you are more likely to read about something being comprehensive or detailed. Of course, it has a slightly different meaning to comprehensive which means covering a wide range – it can include most or all aspects.