Interesting. Bobek's and Lipinski's coaches weren't exactly pushovers (Carlo Fassi and Richard Callaghan.)
It may have been when Bobek was between coaches, but I'd heard she taught herself the double lutz by watching more advanced skaters.
I had also heard that a big part of the reason that Lipinski and Jeff DiGregorio parted ways after 1996 Jr. Worlds (i.e., almost a year after the clip shown above) was because she wanted to put the triple lutz in her program and he didn't want her to.
That's what I was referring to.