Like I said, I couldn't comment on that, I tend to trust the developers of this here sim more than other users in this forum - no offense, it's just that I couldn't know where *exactly* you are getting that from (see above: is it the correct documentation for the exact version of our bird etc. etc.).
So to you too I would say: would you mind bringing that up with Wags to clear up CAT limitations with regards to roll rate? I have Viper manuals myself, alas no ~2007 block 50 ones.