Don't know of anyone who tissue cultrues jaboticaba, so it may be a moot point, but i think they would be even slower to fruit from TC than from seed.
I have tissue cultured Red Jaboticabas for sale, they cost about $5-$8 ea, depending on how many you purchase! Prices are subject to change.
they are still small, approx 6 inch tall, but healthy and ready to ship!
sorry I have not tried to grow tissue cultured plants out to fruition, but so far they are comparable to seedlings...just a little slower during the initial phase of juvenility.
also sorry I don't have much info on the process of tissue culturing these plants. From what I can gather, it can be somewhat challenging.