For the most part no. Today's touring pros are far better athletes and they can optimize thanks to launch monitors & coaches, than the pros from generations past. That's not to say club & ball improvements and course prep haven't contributed, but today's blade irons aren't that much different than 30 years ago.
Most (non-senior) pros still use blades or mildly GI irons that still have lofts much like years past - a pro 7i is about 34-35 degrees loft, Tiger Woods 7i is 36 degrees! It's only amateurs, especially seniors, who buy GI and SGI irons that have FAR lower lofts than 20 years ago, because they go farther - an SGI 7i could have a loft as low as 27 degrees. The difference is 2 or 3 clubs! Not rocket science why they go further, largely lower lofts...though it's a topic that's been hotly debated FOR YEARS. The number that's stamped on the sole of today's irons is somewhat meaningless.