It is true that bigger older well grown plants have the potential for more and larger flowers. Still, 8 on a spike is perhaps unusual for this type of Catt. None of the major ancestors of this hybrid normally have more than 6 - 7, and the the most significant ancestor is C. walkeriana with usually 1-3. The power of selective breeding and perfect care. It may have had something to do with the weather in the last year, or even that it is slightly overgrown for the pot. But you can certainly take some credit for it.
We will require proof with a picture when it has most of the flowers open.
One of the parents of this cross is Rlc. Hillary Rodham Clinton, so maybe it is just enthusiastic about the upcoming election.