Well. There are quite a few factors. The main one I think is that you might have found a tech that works well for you, and the others have yet to find one.

Did you start in July last year?

Also, don't discount that you mighy be trying harder. Most people that try and LD will only remember to do it every other day and consistency is a big thing when LDing. Some people also think that sleeping 8 hours is too much sleep. This can hurt you.

Also, some people are just better When I first started there were a lot of people that were getting more LDs than me that started at the same time (mainly brother in law). Then I read ETWOLD and got on this site. I finished that book in a day and automatically started frequently coming here. This made me start getting frequent LDs automatically. Starting out good helps a lot, but it doesn't increase the chances of you continuing LDing for a while, that is just will and determination.