Huxley: brilliant post. I agree with everything you said.
My personal opinion, which I would like to think is pretty spot on is this:
Meth in crystal form is now popular more than ever simply because it is so damn good and addictive.
* MOST of the crystal is imported into Australia and can be up to 98% pure as opposed to the old ~25% stuff baked by bikies as mentioned by someone earlier.
* Crystal can be smoked which is extremelly addictive - this is relativelly new to Au and more and more youngsters prefer this to snorting. Another thing that has to be mentioned about smoking is the fact that not only does it give you an absolute high only beaten by shooting, but there is not ONE thing that turns people off it. A lot of people hate snorting because of the burning in the nose. Some hate it because of the aftertaste in throat. ("Quick, i need some water!!!" - sound familiar?) Smoking is just bliss. And the taste of smoke of good meth can be learned to be loved.
* Crystal has few annoying side-effects such as sore stomach, head ache etc. which are a lot of the times due to dodgy impurities in locally produced stuff. This means that a person could only have so much of the old stuff before beginning to actually feel sick next day. Now they can just keep going.
* Linking to above point, due to the fact that the impurities in locally produced stuff capped consumption, many people (who don't shoot) have never ever been actually off their tree properly and have always dismissed it as shit (i've heard comments like, oh i only take pills, speed just gives me a little buz for a few hours and that's it). Now, consuming the same weight of crystal meth sends people flying, and suddenly, its like 'hey, this stuff is fucking awesome'.