There's a great feature matrix web page prepared for the launch. I'll see if I can get permission to post it, or at least its contents, here. Might be a few days as I'm out of the country right now.
Also, while Sarbanes-Oxley is the SarBANEs of my existence (see what I did there?) in many ways, Adobe Creative Cloud subscriptions may enable us to release features between standard release cycles. I know the idea of subscription-based software licenses is scary to many, and until I'm much more knowledgeable about the service and how Audition fits in, I don't want to say something incorrect or that I'll regret. (The internet remembers F O R E V E R.) When I have all the information, we'll talk.
Here's a quick list of the effects present in Au3 that are not yet ported as of CS6:
Generate Noise
DTMF Signals. (This can be accomplished manually within Generate Tones, to some degree.)
Pitch Bender
Stereo Field Rotate
Stereo Expander
Pan/Expand
Graphic Panner
Binaural Auto-Panner
Convolution
Dynamic EQ
Quick Filter
Scientific Filter
Dynamic Delay
Echo Chamber
Multitap Delay
Envelope Follower
Frequency Band Splitter
Vocoder
The other slight snageroo with effects list comparisons is that as of CS6, they aren't really going to be comparisons as such anyway. For instance, even if you say that the Dynamics Processor is present in AA3, 4 and 5, that doesn't tell you that in 5, it has side chain access, does it? You are going to end up with one heck of a lot of footnotes if you're going to do this justice, what with all the changes...
Anyway, I said I'd do a list of the effects in CS6, and having just gone through it, I can see why Durin doesn't want to - it's quite a long list! What I hope it does though is put Durin's list of exclusions into some sort of perspective...
Amplitude and Compression
Amplify
Channel Mixer
De Esser
Dynamics Processing
Hard Limiter
Multiband Compression
Normalize (process)
Single Band Compressor
Speech Volume Leveler
Tube-Modelled Compressor
Fader Envelope (process)
Gain Envelope (process)
Delay and Echo
Analog Delay
Delay
Echo
Diagnostics (yeah, I know... but they're in the Effects list!)
De Clicker (process)
De Clipper (process)
Delete Silence (process)
Mark Audio (process)
Filter and EQ
FFT Filter
Graphic EQ 10 band
Graphic EQ 20 band
Graphic EQ 30 band
Notch Filter
Parametric EQ
Modulation
Chorus
Chorus/Flanger
Flanger
Phaser
Noise Reduction / Restoration
Capture Noise Print
Noise Reduction (process)
______________________
Adaptive Noise Reduction
Automatic Click Remover
Automatic Phase Correction
De Hummer
Hiss Reduction (process)
Reverb
Convolution Reverb
Full Reverb
Reverb
Studio Reverb
Surround Reverb
Special
Distortion
Doppler Shifter (process)
Guitar Suite
Mastering
Vocal Enhancer
Stereo Imagery
Center Channel Extractor
Graphic Phase Shifter
Time and Pitch
Automatic Pitch Correction
Manual Pitch Correction (process)
Stretch and Pitch (process)
Also Generate Tones and Match Volume are in the Effects pulldown menu.