Generally speaking, a higher BBCOR will yield a higher BBS, but it's not a 1:1 correlation. You also have to take into consideration that the BBS he's referring to is not an on-field measurement, it's just the predicted batted-ball speed based on a calculation (very similar to the calculation used for ASA softball). Speaking generally though, a higher BBCOR yields a higher calculated BBS, and higher on field batted ball speed.
The correlation between BBCOR and BBS, numerically, has been debated. In my dissertation, I proposed that a 1 mph change in BBS would be equivalent to 0.016 point in BBCOR. In my testing experience here at Easton, I would say it's less than that, maybe more like 0.011.
A good high end BESR bat would probably be approaching 0.550 BBCOR. That means a high end BBCOR bat is producing about 4-5mph less than a BESR bat, which I would equate to about 30 feet or so in distance.
As it stands, most manufacturers have no issues putting alloy bats right on the limit. The problem with composites is break-in. The key is to minimize break-in so that the bat can be very close to the limit out of the wrapper, and not go over with use. I really think we do a good job of it, our new composite BBCORs are entirely different from last year. Other manufacturers haven't been so lucky yet, but I do expect that some of them will get there, and it will be because of the tune-ability that composites provide.