So I pitched my 1gal starter of wlp802 ( .5 gal stepped to another .5 gal...estimated at 500 bill cells) into my pilsner at 1.051OG. I pitched decanted starter into 60f wort and It started fermenting after 6 hours, and now at about 81 hours of fermentation, it's at 1.020. I'm thinking tomorrow night I better do the d-rest, as at 1.019 I'm at about 80% complete since my final should be about 1.010. My fermentation temp has been 51-52f. This just seems really fast to me...but I've never used this yeast before. Ay thoughts?