Top Sirloin - question

[Tania]

Is it a hybrid or not?

Google returns non-tomato-related links, for obvious reason

The only description I found was this:
"Indet. Hybrid. This new, beefy, red tomato is not yet widely available. Late to mature, but these big, flavorful fruits may be worth the wait"

..but I think I also saw it on someone's trade list at GW, just can't remember off top of my head where it was, so it must be F2 or F3 that are offered then?