There are two dimensions:
1. What reads best
2. What people are used to
I'd say that with sufficient familiarity of a term, it becomes easier to understand than something with an objectively better name. "float32, float64, f32, f64" is in use a lot, "real32, real64" isn't.
I have a weak spot for "real" out of nostalgia for Pascal, but I'd say I'm an exception.
