It's an interesting debate on that one....my gut says less people would die, but the areas in Holden where the tornado tracked definitely have a lot more people than in 1953. North Worcester area hasn't had a big population increase since those days....some....but nothing like Holden. Most of the neighborhoods in N ORH where the storm tracked were already built in 1953.
People being caught in their end of day commute could offset the warning available nowadays vs 1953.