The questioner doesn't get a +2 for accepting a CW answer.
I have not been able to find a definitive answer, neither this answer:
What are "Community Wiki" posts?
nor this answer:
No reputation from accepted answer
help. They talk about is whether votes on or acceptance of the answer generate reputation for the answerer, but not whether the questioner gets their +2.
How does accepting an answer work?
If you accept:
which implies that no one gets any reputation, but the linked question is the "What are "Community Wiki" posts?" one I mention above.
I'm marking this answer as CW as a definitive test.