Little late but since my experience was different I thought I would throw in my two cents for future readers...
I consistently scored ~20 on my chemistry sections, ~22 on my BIO sections, ~17 on QR, ~16 on PAT and ~20 on RC on bootcamp as I went through the BC exams I scored a little better on each one.
I found BIO to be much harder on the DAT and gen chem, orgo, QR and RC to be much easier on the DAT, while PAT was about the same. Consequently, my scores were 22 BIO/ 23 GC/ 24 OC/ 24RC/ 19 QR/ 20 PAT. Way better than any BC score I got.
I think the lesson to learn that that the DAT is a beast of an exam that has many variations and is extremely unpredictable. I would say bootcamp and previous DAT's offered by ADA are your the best bet at guessing where you will be. Focus on breadth over depth that's the most important.