Wouldn't think that it's exceptionally long.
What's of more concern, overall size of the queue file, or number of files or articles that are queued up, does it help if they are grouped more, 'cos mine usaully are?
I might have say 5-10GB of stuff queued, but the number of articles varies, sometimes there's whole 1Gb files, mostly they are split up obviously, my queue file maybe is a max of 6Mb at times.
It's difficult to know how many files are queued up, there's usually far to many to count.
par2 list never very long either.