Back in the 80's, I went to Botswana and hunted with Hunters Africa, with the the late Gordon Cundhill as my "pro". Cundhill was a very impressive man and his operation left nothing whatsoever to complain about.
I went with Hunters Africa twice. The first time, it took me 4 to 6 months to get my "trophies." I don't remember, exactly, but I do remember that how long it took me to get them was exactly how long I was led to believe that it would take. Mine were simple "dip and ship" affairs.
The second time, I didn't bother. In my office, I have the rack from the first deer I shot as an 11 year old kid hanging on the wall, but aside from that, I'm not really in to decorating my house with dead things (nothing whatsoever against those who are), and probably wouldn't have the rack from my first deer hanging above my head right now if it weren't for the appreciation I have for the effort my dad put in to making the mount of it. That stuff I had shipped from my first trip to Africa just rots away in boxes. The photos of the trips mean more to me than the hides and horns from the first trip do.
From what I gather from people I know who make hunting Africa a habit is that 6 to 10 months is pretty normal wait time for arrival of hides and horns.