Not bad, after this weekend it would conceivably only need 40 or so mill to crack 300dom. I also hear it's going for 650plus ww. Solid numbers.
Most films of this nature seem to do about 30 to 40 after the third weekend. 
GotG did something like 100(and some) but that seems rare(curse of black pearl rare)...Though the black pearl wasn't the 11th film in a franchise smack dab in the middle of it's wildly popular run of the genre. I think SS fans should be flattered that the film they like is being compared to something like that tbh. It would do well to be compared to the likes of TWS(it's non china take in particular), 260 would be very significant, or Thor's...or most pertinently the third film in the mcu, budgets and all.
At this point I'm surprised fox fans don't just compare all solos to deadpool, then when one of the odd solos shows up in a discussion, one that actually outdoes it domestically, just point to the revenue argument. That's kinda how it goes now.
The numbers are pretty solid.
As for all the front loading talk, I'm sure wb is happy with a 300 plus haul on a property like this, especially given what alot of solos tend to do. That being said, like alot of the detractors keep harping on, this supposedly had big draws to it, joker and such(not sure what else), it's no wonder it's performing at the momentum of some sequels, only unlike some sequels it's scored at a 27%. Not really rocket science to assert non fans and fence sitters are staying away.
One of the biggest things hampering down the comparative discussions of success is the placement of the films. Had GotG been the third film and preavengers success, it would conceivably have performed differently, especially overseas. If avengers had been the second film, the way people assert DC's 'avengers' was...
I suppose this is the price for playing it backwards, one of the benefits, hot having to slog through phase one grosses.