Its variable because all the two bedrooms are lockoffs. So if people book two bedrooms there are fewer studios.
As long as you don't book a holiday weekend or a marathon weekend, and book right at seven months, your chances are good to fair to get a standard studio in mid to late January. Fair to poor for early January. Poor for any marathon or holiday time.
BWV standard studios can be gone at 7 months out any time of year. If by Jan you mean any time before the end of marathon weekend, which ends shortly before mid-Jan 2017, then your chances are slim because all of BWV is likely to be gone before 7 months out for that first part of Jan (you will be completing holiday time early Jan and then running into marathon weekend which are both among the highest DVC demand times of the year).The rest of Jan is likely to be a problem for standard but at least some hope.