Just as an addition as to maybe the pilot sounded a little miffed.
We have Wake Vortex separation minima to follow for departing and arriving aircraft. But sometimes, certain wind conditions can actually cause the vortex to remain longer.
There have been instances of inbound medium aircraft following heavies, where the standard is 5 miles in trail or crossing the same point, and the following medium has reported being bumped around while a good 7 miles behind.
And not making light of the situation, but when asked if the pilot wishes to file a "Wake Vortex Report", some say yes, some say no. I guess the severity and effect of the vortex determins this.