If you read my post...you'll see I also talk about the size of the opening!
to tell you the truth cockits nowadays are longer then they were pre-1995!....they are longer nowadays...and the opening is slightly bigger but with the high cockpit sides it doesn't seem like it.
In the past they made them as small as they could....nowadays they have a bigger opening! just to point out one thing....nowadays at the Ex-Loews hotel corner....you see the hands and part of the steering wheel when total lock is applied...before 1995 in same cars you couldn't see anything!
This doesn't mean that all teams made it that way!...but most of them made them as small as possible!....one famous example the FW16 (with which Senna had the fatal crash)....the hands of the driver were completly inside the cockpit!...and the opening was very small.