Hello.  You can add me to the list of folks having similar trouble.  Patches take 30-45 seconds to load.  Using latest plugin, 2.5.1 AU under digital performer 8.07 on a Macbook Pro with OS X 10.10.3.  Other than the lag on loading patches, plugin works fine once a patch is loaded, though the interface seems a bit sluggish when toying with parameters while the project is playing.

Best,

Chuck