It really does depend on the rabbit. My best mother wasn't ready until well after a year, and the first buck I got decided that does were only for snuggling on until he was 9 months old.
On the other hand, the breeder I bought out when I got my stock had one buck that started his career at 5 months old, and I did breed one of my does for the first time last night and she lifted at 7 months old. I usually wait until 8 months at least to try for does, but she was interested, so I gave it a go. 6 months is usually the norm for bucks, but then again, if they're ready, they're ready.
The only reason that Frenchies are usually given a long wait time until breeding is because they are a large breed and mature slowly, but even at that they all can mature at different times. The size of the lines seems to play a large role in it too. If you have smaller lines, they typically finish growing faster, and will mature faster. The larger the lines, the longer it takes for them to fully grow, and the slower they mature. Both of my rabbits that took longer to mature are VERY large for frenchies (11 and 13 pounds) and the ones that matured faster are smaller (8 and 10 pounds).
Sorry I can't give you a steadfast answer of when you can expect to be able to breed, but its just how it goes!