I don't think so.
Three years, but it can also be four depending on the address, is the minimum duration for the first degree, the so-called bachelor's degree.
Sage, for example, makes it clear that she considers it wrong to stop at the bachelor's degree and is the only one to talk about thesis discussion and graduation, while Tommy, Rusty and Jill, who are in their third year, never mention it
and even in the flash back when Tommy and Rusty are freshmen Sage is already an important reference of the HOTs.
so the age difference with Sage is wider