If I'm following this correctly, they say midi 2.0 will reduce jitter ?

Translation to/from the MIDI 1.0 Protocol
JR Clock and JR Timestamps cannot be translated to Non-UMP MIDI 1.0 Systems, but they can be used by a Translator to improve timing. If a Translator understand JR Timestamps and receives messages with JR Timestamps, then when translating from a connection with JR Timestamps to a connection that does not support JR Timestamps, the Translator shall schedule the MIDI 1.0 Protocol messages according to the received JR Timestamps. When translating from a connection that does not support JR Timestamps to a connection with JR Timestamps, the Translator may generate JR Timestamps based on the time of reception.

MIDI 1.0 does not send delta times at all, so you can only adjust the time at which events are sent.

[quotePost id=20285]If I'm following this correctly, they say midi 2.0 will reduce jitter ?[/quotePost]
yes, Universal MIDI Packet (UMP) Format and MIDI 2.0 Protocol, Document: M2-104-UM page 26

if I understand it well it's an enhancement of the MIDI F8 clock by replacing it with a new clock message and an message (JR Timestamp) to adjust a message's timing related to that (JR) clock.