Hold on! You are in as much danger of getting carried away as the BBC commentary team was over the weekend! Muir ran extremely well in both events - and hats off to her in putting in an honest effort when she could almost certainly have won both events in much slower times - but lets be realistic.
1) The heats in both events were hardly very testing for an athlete with her current form and PBs. In the 3K she benefited enormously from being in the second heat. She could "jog" round and qualify as a fastest loser.
2) The competition was, by the highest standards, not terribly good. She went into the 3K knowing that a solid run, by her current standards, would give her the win.
3) Looking ahead to August, I see her as a solid favourite for the 1500 - in a race where the pace is honest. In a very slow affair, like the men's in Rio, I wouldn't have total confidence in her last 300 being quicker than everyone else. In the 5K she is a novice. Has she ever raced a competitive 5K? A fast even pace would probably suit her but in a typical championship race with uneven pace, lots of jostling and bumping ...?