Extremely so. Look, even I myself became infected.

[ It's not hard to pull up a sleeve to show Kuja a few scattered crystaline growths. If that mineral isn't familiar to him then their worlds could not be the same...or the gulf of time must be truely enormous. ]

...Do not take my words to mean I think your theory is without merit. I've heard some tell of the theory time may bud like a tree. Branching paths may have had a singular origin point; Perhaps our homes are only siblings.

What is your home like, if I may ask?