i havent seen prasanna bowl but definitely over the last 20 yrs australia and england have become much better players of spin bowling. when prasanna used to play spin bowling was in its infancy and batsmen had just started to adapt to it. I am sure that if the quartet played today they will take less than half of the wickets they took against aus and england..West Indies is a different story all together.. He has no right in telling murali is not a great off spinner with the tremondous success he has achieved.