It was possibly the most striking line in Janet Fitch's White Oleander: "the mistrust of heights is the mistrust of self; you don't know whether you're going to jump." In fact, the notion is so ingrained in many people's psyches that it seems as if the quote has become a sort of aphorism. Nonetheless, the broad consensus for those companies that offer ropes courses is that by being up high and negotiating a tricky course, it is possible to develop important team-building skills.
The most direct statement of principle can be found on the Bushsports Team Building Activities website, which lists the skills a participant can hope to attain with reassuring certainty. By taking part in the courses, which vary in altitude and complexity, people will develop their ability to work in teams and extend their comfort zones.
As the website says, "the Sky's not the limit - look beyond!"
The real limit appears to be the price one is willing to pay for the opportunity to stand at the level of the tree-tops. 5 to 10 participants, taking part for 3 to 4 hours, prices range from $2,200-$2,500. For 21 to 30 participants, over 3 to 4 hours, the prices range from $3,900 - $4,400. The premises, based in the Northern Beaches, can accommodate up to 200 people.
YMCA Camp Yarramundi runs a variety of ropes courses for school, social, and corporate groups. With an accommodation capacity of 220 and the possibility of taking part in activities that do not involve quite as much altitude, the one hour drive might be worth it. The pricing is fairly opaque, however, with a booking form alluding merely to a "quoted price".
Team Building Australia also offers a ropes course program designed for corporate groups. Priced at $125 per person (for a minimum of 4 people) and located in the Blue Mountains, at the very least, you will be able to enjoy the scenery (at ground level) before performing death-defying acrobatics.