I shoot the Sims a lot and really enjoy it. They say it is all about "Shootability" and it has that for sure.
The IBO speeds are obtained at IBO standards and to achieve that with the DZ-32 that means the Large cam is used. If you got that Wholesale Sports screaming deal they had it probably has the small cam at 28" draw. Depending on the length of your arrow the numbers don't seem that far off to me.
Duke Savora had a good saying in regards to speed, "I'd rather kill 'em at 200 than miss 'em at 400." Speed is nice to have, but meat in the freezer is even nicer.
Welcome to the DeadZone!!!