Err, not to say that Holding and co. wouldn't dominate Cook and other opening batsmen now...but I highly doubt the 97mph figure.
Michael Holding
"Standing 6ft 4 1/2in tall, Holding was all grace and showed unmistakable quality, class and speed off a long rhythmic run to the wicket. In this same series with the introduction of the speed gun technology, Michael Holding still only twenty one was a shade faster than the Australian Jeff Thomson. Holdings fastest ball was clock at 97 mph,"
But, as I said, Holding pointed out in his autobiography that although he bowled very fast in Australia, he was expensive because he lacked control. In later series, he learnt to vary his pace, mixing it up with slower balls and very quick ones.
The fastest spell of pace bowling I've ever seen was at Sabina Park in 1986, when Patrick Patterson made his debut, and destroyed England. I think Ian Botham made a similar observation. I have not seen anyone in the present bowl as fast as Patterson did on that day.
I don't think Cook is qualified to talk about this, because he never watched Patterson et al bowl. It would be more interesting to hear Botham's view on the subject, because he faced the WI quartet, and as a commentator, he's watched the present group of players.
Interestingly, Patterson never learnt how to bowl anything other than fast, so he was one-dimensional, and didn't last long....