Actually, that's better than I would have guessed for Yang.
Way better than I would have guessed for Buttigieg. I just recently heard the name and still don't know a single position he's taken or where he comes from.
A lot of the mid-pack like Yang and Buttigieg are helped by the fact that people mostly don't know anything about them.
Note that ones that people actually know about who have actual track records like Inslee and Gillibrand and Booker are waaayyyy down there. Inslee, with a track record as a governor, is in there with a whole pack of people who aren't even likely to run.
That will change though.
In any case, what remains to be seen is whether anyone on that list can beat Trump in a knife fight, for a knife fight is coming and so far it's looking good for Trump according to the betting markets.
https://www.predictit.org/markets/detail/3698/Who-will-win-the-2020-US-presidential-election