What happened to Emagic's good old AMT = Advanced Midi Timing in Logic 7, 8

I wonder if anybody knows if Apple dropped the AMT-algorithm enabeling Emagic's AMT 8 and Unitor 8 Mk 1 and 2 to be more accurate in Midi timing than ordinary interfaces without AMT are. The last button/check box that was related to AMT (Advanced Midi Timing) I saw was in Logic 6. Steinberg and Motu had their own timing accuracy systems then.
Since in the whole Logic Studio manual AMT is not mentioned a single time I supposed this very useful tool has been sacrificed by Apple's dingy future spirit.
Not to be misunderstood: I know the interfaces can be installed and are supported and be run by the actual machines and systems as normal Midi interfaces .

Just having a random search around:
http://developer.apple.com/audio/pdf/coreaudio.pdf
"The MIDIPacketList are a time-stamped list of packets to or from one endpoint.
All MIDI I/O functions use this structure. The MIDIPacket contains one or
more simultaneous MIDI events."
Also, back when Logic was first going in OSX, emagic had an article about this as well, although that's long since gone.
OSX's time stamping isn't exactly the same as AMT in detail, but is in essence the same thing. AMT works by time stamping events ahead of time, so the interface can fire them off as close to perfectly as the current MIDI stream allows. If you have two events at 1 1 1 1, but on different ports, an AMT interface can fire those events at precisely the same time, which can't happen with a regular (non-timestamped) MIDI stream, as the stream is serial in nature.
Because OSX has time stamping built in to the MIDI server, theoretically all MIDI output operations under OSX should take advantage of this - but at the geeky levels, I haven't been programming with this so I'm not completely up on all the details - it maybe that programs have to be written specifically to take advantage of it.
In any case, it's these reasons why AMT was never supported in Logic under OSX - it was basically redundant.

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What happened to Emagic's good old AMT = Advanced Midi Timing in Logic 7, 8

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