Pictures of the tail (a horrible guage for true size) kinda looks like a large F (super), but all I've read so far cite it was an older D.
About adding speculations to the speculating - the rear nozzles are hydrolicly/actuated controlled I believe, could of been a hydrolic problem (amongst bigger issues), also they're rather easily manipulated by outside factors... a fancy way of saying they're more flimbsy and movable than you first might assume. Also, and another honest assumption I'm making from observation, having watched and walked a couple feet from an acutal F-18 pilot doing his pre-flight.... 99.99% of the time, people who "know", is a fancy term for "good guess".
I gon dun now one ting fur sure - a crash that hard would do a little more than rearange a couple Navy pilot's "nozzles", if chya now wut I meen.