I took an Achiever test day before my real DAT and got
16 bio 18 GC 19 OC 20 PAT 14 RC 15 QR
real dat 21, 21,22, 21,18,21
So yea you get around 4 points higher on the real thing. Its tough also and will make you feel like crap because of how hard it is but dont let it discourage you.