That's why it was impressive - because she hardly labored at all for 4k (at a decent pace) and then in the final 1k switched gears like nothing. I don't recall saying it was "solo performance" anyhow. If she can handle 3min. k's EASILY and then drop a 2:45, why could she not average 2:55s for 4k and then go with her leg speed and see what happens, especially in a European race where she'd be getting pulled anyway! She had a 14:30's in her no problem had she raced the event more often. Whether or not her performances were assisted is a whole other thread.
Also, I don't know about world class women examples, but I know several college runners who had run 14:40's and 14:50's and also have 4:05 range 1500 PR's. Of course, they raced the 5k much more often than the 1500, but it isn't all that uncommon.