Ok I'll rephrase. 'Modern Day pitching', which I'm sure is better due to mechanics. The 90mph fastball idea just seemed to be the best way to say it at the moment. =)
I understand what you are saying and I disagree mightily.
Back when there were a total of only 16 teams, and each team had a rotation of only four starters, the competition for those starting jobs was a lot more fierce than it is today.
There were very few "mediocre" pitchers. Look around the league today and you'll see that most teams have an ace or two and then fill out the rotation with a parade of nobodies. From night to night, Ruth certainly faced better pitching than today's hitters.