Scientific appealing?

Cricinfo has done a little analysis and come up with the following figures on lbw appeals during the VB series:

In the recently concluded VB Series, Australia had 47% of their lbw appeals upheld, while for Pakistan and West Indies, the other two teams in the competition, that figure was less than 14%. Of course, ask John Buchanan about it and he'll probably say that the Australians were choosy about their appeals, while Pakistan and West Indies went up for everything.

Country - Total appeals - Given - % given
Australia - 21 - 10 - 47.6%
West Indies - 15 - 2 - 13.3%
Pakistan - 20 - 2 - 10%

In fact, in all ODIs in Australia since April 2002 – when one third-country umpire was made compulsory for one-dayers – only 6.7% of Australian dismissals have been lbws (15 out of 222), while the percentage goes up to 9.3 for overseas players (28 out of 300). Simply a statistical quirk, or the result of scientific appealing?