I've only made one batch ever and I used about 1/3 of the vial of California V and it took off overnight. I have never had to use a starter in my winemaking.
If I made a starter, I would also add some yeast straight to the mix. It makes a lot of sense to do that; kind of hedging your bets in case you accidentally kill the yeast in the starter or the starter doesn't do anything to the wort when you add it. Also, don't stir ale yeast ... they are supposed to ferment at the top, right? The yeast have the best oxygen exposure at the top which is crucial for growth and division, which is why for wine you sprinkle a bit of dry yeast on the top and don't ever mix it.
Hook'em,
Doug