My guess would be yes.

1. There are claims that the gastrointestinal tract includes taste organs,
even if we don't consciously perceive it.

2. I have read (in Taubes) that just the anticipation of a meal leads to a
"first wave" of insulin release.

more insulin, more body fat

Sweetness is associated with carbs, which require the most insulin.  It
would be surprising if sweet but calorieless foods didn't trigger increased
insulin.