QUOTE(Andromeda_Aiken @ Sep 25 2006, 01:12 PM)

How long does a person on average, take to learn proper vibrato? I've heard (and now know) in the beginning stages of learning, it doesn't sound nice and often, the player isn't able to keep the vibrato up for long. My teacher told me that vibrato comes from the fingers but mine seems to come from the wrist. It's weird!
Vibrato can either be termed as 'wrist' or 'arm'. If your teacher is implying vibrato comes from the fingers alone, then they aren't explaining it very well. It's a combination of movement in the arm, wrist, hand and fingers. Your fingers do need to be quite strong and the position of the left hand needs to be well up and over the fingerboard. Fingers that are placed flat or collapse at the joints won't be of any use for vibrato.
I was just lucky, I never had to be taught vibrato, it just developed naturally. It was a natural progression in my playing that allowed me to switch vibrato on and off as the mood or style of the music required, vary the speed, width and alternate between arm and wrist vibrato. I would say 75% of pupils aren't so fortunate, they have to be taught it and very often they end up with a very 'one-track' vibrato that doesn't fit all. Ensuring your early attempts are correct will help the development. I believe there are some books out now for string players called Viva Vibrato, which gives helpful advice to those who may be finding vibrato something of an issue.
Complete relaxation in the left shoulder, arm, wrist, hand and fingers is an absolute must. Any tension, however minimal, will inhibit vibrato and create many problems.
Once you've got the knack of it, it ultimately boils down to practice, practice, practice.....