What is the difference between the progress of low and high intensive meditators?

What is the difference between the progress of "low intensive" meditators as opposed to "high intensive" meditators? By low intensive I mean like a meditator who has never been to a ten day intensive retreat and spreads sitting time over a longer period of time. By progress I mean Vipassana insight progress, Jhana progress or any other kind of meditation progress in any tradition.