[whpalmer4]

Hmm, perhaps you need to look at the size of the OmniFocus file on your iDisk instead (defaults to the Documents folder there).

There will be less of an impact if it isn't doing a sync at startup, but there still is an impact because among other things it has to build a representation of all of those transactions in case you do a sync. Performance will be much better once both clients can put all that past history behind them :)