Well, it's hard not to see DAG in Byteball design.
It's also seen in Ethereum design, any idea why they call themselves "chain", not "DAG"?
- GHOST protocol gives a similar topology of blocks and if we have only 1 transaction per block then there is no difference in first order approximation.
And what? Of course, there are edge cases. And I didn't invent DAG if you want me to admit that

- The whitepaper tells about ordering and the main chain.
And?
I just mentioned things which point toward "chain", not "DAG".
- There is no publicly available information on transactions topology in high TPS mode (this would show if Byteball utilizes high scalability granted by a DAG).
Any reasons to believe the topology will be in some way "wrong" in high TPS mode?
Yes. I suspect the ordering will slow everything down significantly. Is it hard to run a test?