Everyone LDs at different rates. There are a lot of variables that go into this rate: their brain's physiology, the technique they used, how often they think of LDing, how consistent their sleep schedule is, their diet (including drugs and vitamins), and their self-confidence.

I catch onto things quickly. Always have, always will. I use MP3s every other night (or less... Depends on how confident I am). I use a short WBTB in conjunction with WILD (which has thusfar failed, but produced good DILDs). I abstain from all drugs and pills. I keep a consistent sleep schedule, even on weekends. I lucid dream several times per week, sometimes multiple times per night, unless some other fun hobby *cough*videogames*cough* catches my attention (in which case I have a lucid dream once every couple weeks).