I totally agree with the practice theory. Ive been playing for 10 months and my low is 81 but 90% of the time its between mid 80s-low 90s and thats with several lessons, practice range 5 times per week, 4-6 rounds of golf a month and living and breathing golf. Takes more time than people think. Its different for everyone, if your really gifted (2% of the population) you should be a scratch golfer within 18 months but how many of us are? Hard work should get you in the 80s in 18 months.