This was written by the plugin manufacture AudioDamage.
AND FINALLY: This is only semi-related. I've lately noticed a lot of people that use Live as their main DAW, and don't have Logic at all, who use the AU instead of the VST. All our recent products are built using Sonic Charge's Symbiosis compatibility layer, and the AU is just a VST with an extra layer of crap on top to make it act like an AU. With commercial plug-ins, it is very rare for the plug to be a true AU. Almost all commercial plugs use some sort of compatibility layer or wrapper to create the AU, and you are nearly always better off using the VST, given the choice between the two.
That's because they are using Symbiosis which as he says is a wrapper not a true port. Symbiosis is also buggy and has had general issues making AUs that are compatible. Using the AU template provide by Apple is a better way to go, but more work. If manufactures are using Symbiosis they are being lazy.
Also if you browse the forums with real world evidence please provide me the data which suggest AU (not made by apple) works better then VSTs ?
You are the one making the claim, not me. I love the internet, people make stupid claims as fact, then argue that when they are pointed out as stupid the burden of proof is on you.
edit: jkn - fixed the quote attributes for Loren.