"Appeared" may be the key word here. The applescript interface to Omnifocus is irreducibly slow, and you will need more than a few minutes or so if there is a lot of data.

The other version has been broken by some Applescript changes - I will try to find time to mend it. Its only advantage is feedback on where the process has got to, which tends to prevent worried users from needlessly aborting after a few minutes.

I would suggest planning to leave it alone to cook for a good period of time while you read a book or have a meal :-)