"It was one of the factors"
''It was one of about 6 factors and probably the least contributory''.
But it meant they went off the end quite a bit faster - and caused more damage. It's a while since I flew the 744, but I remember the difference between flap 25 and 30 was quite significant. The big issue was the mind-set. They were used to landing with F25, so that's what they did - even though the runway was contaminated.