You do have to be careful with counters. If they're ripple counters, they'll ripple in cascade. And just because a counter is a synchronous counter doesn't mean that it's synchronous in every sense or will be synchronous in cascade.
For instance, the 74192 synchronous decade counter is synchronous in its counting only. Parallel load and reset are asynchronous operations. And when you want to cascade them, the various stages will be rippled even though within each stage it's synchronous. You have to use a 74160-series counter to get full synchronous operation in all phases.
But you'll still potentially have a non-symmetrical Qd output if it's not a straight binary counter. As mentioned, it takes a pretty special application of a counter such that you require a symmetrical Qd output. Using a Qd output as the gate input for a frequency counter would be a bad idea!