Don't believe a word of it. Wolff springs do lighten the pull. You could also polish the hammer sides and radius the edges and clean the trigger group. Use a clp to lube and reassemble. Get that old grit out of the trigger group. You could end up with a very lite pull thats still very relible. A buddy has a bag full of ruger security siz models all litend and great shooters.
http://www.youtube.com/watch?v=96lc7XGZIxE