I was making my first starter with WLP530, and after pitching the PurePitch package into the starter wort, I decided to taste what was left in the package. I was really surprised by how incredibly sour it tasted! Regardless, I made a 1.3 liter starter on a stir plate, and pitched it into a 4.5 gallon batch today. The starter tasted a bit on the sour side as well, albeit much much less than the vial. I decanted about 1/2 of the starter, but still ended up pitching about 20 OZ of the funky starter, plus the yeast cake, into 4.5 gallons of wort. Can anyone confirm that liquid yeast straight from the vial/package tastes very sour/tart? I'd have to be very unlucky to get a bad package of WLP530 for my first batch with liquid yeast.