Well within the MOE. And certainly not a precipitous drop-off.
The people that saw a large fraction of the sample being 62+ seemed to lead to a leap void of support, that this oversampling is the reason Trump polled so well overall. If the poll was cherry picking voters age 62+, it would have LOWERED the aggregate result, not improved it!
Trump leads in all age groups and in all geographical regions of the state, according to the poll. His worst showing, age group wise, is 18-25, where he leads the closest challenger (Rubio) 30-20; and his worst showing by region is 30-20 v. Cruz, in the Midlands.