Dude, i don't know what TSX's u've come across but ive lived in the united states as well as canada. Also the fact that there are 2 accords and a TSX in my neighbourhood doesn't help ur case.
The TSX is a sports compact, much smaller than the mid-sized accord, its higher priced due to the premium branding it recieves (its an acura). What u are thinking of is probably the Acura TL, a car that looks like the TSX but is bigger and MUCH nicer, and one that is marketed in the mid size luxury segment. It's about the same size as an accord.
Don't believe me, here's a 20 second internet search for length/width and height (inches):
Accord: 189.5/71.5/57.1 in.
TL: 189.3/72.2/56.7 in.
TSX: 183.3/69.4/57.3 in.
PS. How can u not know this??? Acuras are a dime a dozen in NYC