How is your performance on generating proofs in WF?

We have many assets with proofing deadlines of 5, 10 to 15 minutes. (it's a continous cycle until the asset is approved/final)

Generating a proof can take 45 seconds to several minutes to generate which takes away precious time to review an asset...

I am wondering if other customers experience the same slowness in generating proofs

I my opinion generating a proof should not take longer then 10 sec (for files under 2 MB)