Like ASA said, the 10 hours of complex is still required.
However, I disagree that any hours of complex makes much sense, as a prerequisite for the commercial. Any employer is going to require a whole lot more time in its aircraft, as much as for insurance requirements as anything. If the company's aircraft are retracts, then the insurance company will require either 15 or 20 or 25 hours, depending on a number of factors. If the company's aircraft are fixed gear with CS props, then the requirement may be pretty minimal, perhaps a 1 hour checkout in some cases, more in others. By the time a pilot amasses the 500 hours necessary for 135 ops, he/she will have little trouble transitioning to a higher performance complex airplane.
I took my commercial and CFI rides in a 172. Once I started flying charter, that was mostly in 182s, and since I already had plenty of time in them, there was no checkout time at all. The FBO's insurer required 10 hours checkout for the 206 and 25 for the T210. But everything I'd learned in the 172s to get the commercial was absolutely transferable to the other aircraft.
The only "extra" item that I hadn't been made aware of until I took my first 135 ride was the advantage of pulling the prop control all the way out to reduce the drag of the prop disc. That's a story worth repeating, because it was something I'd never been taught.
The Inspector and I had flown for most of the ride, which included some but not all of the commercial maneuvers, in a bone stock 182. That was so long ago that I only remember doing a descending spiral, but I'm sure there were others. Then we headed back and did a normal landing. He wanted to do more pattern work, so we took off again. On downwind, he pulled the power and said to land. I immediately turned toward the runway, and with not a whole lot of room to spare, turned to line up with the runway, dropped the flaps, and landed.
The Inspector said that what I'd done was textbook, but he wanted me to do it again. So we took off, and he said to make the downwind as close as the previous downwind as possible. At just about the same place, he pulled the power again. As I leveled in the short base, he said to pull the prop control all the way out, and the airplane leaped ahead! When I turned to line up with the runway, I had a lot more altitude above it, which made it much easier to configure for landing because I had no concern about making the runway.
That little trick can be a bacon-saver when flying a CS prop if the engine fails.
Cary