I started golfing in January of 2009 (age 23)...
-In three trips shot 103, 103, 103 at a 128 slope course. Shot 98 the fourth time out and have only shot over 100 on one other occasion.
-I broke 90 in March of 2010 (14 months later) at a 130 slope course. This came after about 40 rounds, 20-25 driving range sessions, and 20-25 chipping sessions.
I broke 80 in October of 2010 (21 months after start) at a 126 slope course. This came after about 80 rounds(total) 50-60 range sessions, and 50-60 chipping sessions. (If I was smart...... I would have worked on putting occasionally.....)
I'm now a 7 handicap, and shoot between 77-82 consistently at a 127 slope course. For me, my scores dropped in 5 stroke increments....Below a 100, by simply never "duffing" the ball. Always move the ball considerably on every swing. Below 90 by eliminating drops, learning to play my driver ball flight of the day, and avoiding bunkers. Below 80 by practicing chips from 5-30 ft off the green (the best part of my game)....even when I have bad iron day (or windy conditions), I have the confidence to get up and down for par from anywhere. I played 9 on Tuesday in gale force winds...Only had 2 GIRS, but up and down for par 5 times.....
Working diligently on putting now to hopefully play to a 2-3 hdcp by end of Summer. On the opposite side of the ball, I have a buddy who has been playing twice a week for a year......And only breaks 100 every 7 or 8 rounds..