Yes, between my six boas they all have different growth rates (all were on the same schedule).

My jungle male took off and hit huge spurts early while my hypo girl and albino girl have been more regular with their spurts and are still on the smaller side in comparison to the male. My Hog girl hit spurts early but she's really slowed down within the last several months, and my yearling BCO Argentine male is growing slower overall than my BCO female who's just been growing and growing since getting her.