I can only back up what Captain Stable has mentioned.
Take a 737 - there are something like 10 different types flying around in various configurations. I for one couldn't remember what's where on each one.
BA's classic 747s had the overwing exits blocked didn't they. Good thing to remember/read up on (at the time)
Another thing I do is count the seat rows to the nearest exit. I've been through our cabin fire trainer enough times; we only use vegetable oil to create the smoke, but believe me, its down on hands and knees to find the exit. Can't see a thing.
You splitter: agree. Damned discourteous to a fellow professional too.