Who said anything about a stream? Blocks are produced on average every 10 minutes.
Most decent servers can process 128MB block in about 5 to 10 seconds.
... it. But if you say that most servers can already handle it then cool. Will they be able to handle it with DSV as well btw? Is it more complex than normal sigverify or same cmplxty?
It should be the same complexity as normal sig verify but I guess you can put many of them in one TX. Otherwise Ryan's point about DSV being a subsidy doesn't make sense.