Yes males do get over 1500 grams. I think some people on the site have females close if not over 4000 grams. If they are healthy eaters and don't go into breeding mode for months at a time in which a lot of ball pythons will stop eating it can happen fairly quickly. It also seemed that once one of our snakes went into breeding mode the majority of the rest have started to sense something as well and cut back on feeding. Each snake also grows at its own pace. One guy on the site was either attempting or looking into only breeding fast growers on the larger side for ball pythons in an attempt to see how genetic it is. Would be years before it could be proven, but it is an interesting prospect.