Extremely. You can see this by reseaching a school's 1L attrition rate. This is how many students drop out between 1L and 2L. Some schools are known for setting a curve that forces as much as a fifth of the class to flunk out.
I'm not going to name names of some schools known for this. There are schools that are respectable in every tier, but the lower in tiers you go, the more wary you should be.