Wegener's (et al) theory of Plate Tectonics had to prove itself against a hostile establishment for a long time before it was accepted. And it specifically deals with issues of time and force - these were seen as weak points in it by the scientists of the day.
So proposals from the theory might seem to cause difficulty to the YEC position. Specifically, how do they explain the measured movement of the plates, and the phenomena associated with them, such as mountain ranges and sea-floor spreading? Here are slow effects, caused by calculated and predictable forces, which can be directly demonstrated as happening today, and which have a readily associated set of impacts on the geomorphology of the planet, taking millions of years to occur.
I don't think you can just speculate that uplift must have happened much faster in the past to get mountain ranges in a few thousand years, because the driving forces would have to come from somewhere, and their size must be at least partly understood.
Over to any YEC supporters on the system!
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