EBUCK
I ran ran a search ... The extremely accurate and truly non-partisan Urban Legends Reference Pages has MA href="http://www.snopes.com/science/stats/ausguns.htm">decided the Chenel letter is false, not because they have proof Chenel doesn't exist or that he's a flat-out liar, but instead bases much of its decision on the reasoning that a) all stats can be skewed, as we all know, b) that so few Australians owned guns anyway in the first place (due to no 2nd Amendment-style law ever existing there) that it skews the results, and c) you need a long-term analysis of this sort of data to truly determine the effect, not just one year's data.
So really, they're not saying he's absolutely wrong, just more that neither Chenel or anyone else has enough information yet to make a truly accurate determination of the effects of the gun bans.