The more numbers we have, the happier I am. But, as @mkx said, this is specifically for when the entries are offloaded to the hw flow table. I was talking about the (mostly) software fasttrack for smaller devices.
@jhaand However the fasttrack debate goes, the ax3 is a nice device, and it's always best to buy something that handles your use case easily. Especially because later on your requirements may change to include more.