i say more gen chem but if u go through TBR gen chem, you should be peachy. In fact, i hope it stays this way. in my recent MCAT i had one ochem passage but a good number of ochem discretes. Things u wouldn't expect if you do superficial review for ochem. People who took it in june kept screaming GENETICS like it was all there is and that freaked me out. i had only one genetics passage, a discrete and based on my knowledge from my basic bio 110 course, it was easy. Molecular bio was tested along with a good amount of physiology ( i thought they said genetics was replacing physio. go figure!)
My advice, it's ok to read post mcat threads but don't let them get to you. I suggest you do a comprehensive review and cover all your bases. Someone told me you'll always see a fluid question on the MCAT. i highly doubted it but i did get one dressed in suit (disguised). it was an easy one though. Just cover all your bases thoroughly.