And I think presuming it's nothing more than a swipe makes no sense, occam's razor style. There's no reason why she would put that much effort (a several minutes long poem, plus the practice of recital).
Obviously it's not only that. It's a big moment for her and a great honor.
But also I think there was that flavor to it, and I'd guess her target audience thought it was great of her to put that touch in there.