A couple days ago while walking to work I saw one of these C-Tran hybrid buses driving past me and noticed the windshield design, with the corner post window as well as the single-piece windshield that doesn't have the center post.
Here's a picture of the driver's side:
Notice that the mirror is attached to the body from above, not below the driver, so a shorter driver can simply look below the mirror. The corner post appears to be smaller than a D40LF, and that corner window is also there.
C-Tran also has a smaller bus called the Opus (manufactured by Optima Bus, now a component of NABI bus).
Same mirror design, but I can't tell from that corner post if there's a window there or not. Like the Gillig Hybrid, it also has a one-piece windshield without a center post.
Compared with a TriMet D40LFR:
Mirror attaches below the driver, large corner post, center post (although on the 2900s the post is much smaller than the older versions)
And for kicks:
Mirror attaches much higher than on the New Flyers so Operators can look below the mirror; windshield slightly wraps around to the side of the vehicle, smaller corner post.
Mirror just below driver's eyes; driver sits higher on these vehicles and is looking down at the mirror, larger corner post than other vehicles (but not a Gillig Phantom - they have pretty large corner posts); large center post.
Just something to chew on and discuss with Dan. And make "eastcomom" have a tissy fit because she can't for the life of her understand that there are mitigating factors, as Dan has clearly demonstrated, and as the above pictures show, there are better designs than what TriMet uses on half of their buses.