i tapped my bjj teacher yesterday :(

[slippediskmountian]

No you didn't, but with no-gi flexiblity and strength are much larger factors than pure skill.  I can last a whole lot longer against the good guys at my club no-gi vs gi. 
Have you been working your stand up?  In those videos you had the "push hard on them and hope they fall down" technique going for ya .

yeah ... ive got a pretty decent single leg now, and my flexibility helps me turn it into at least half guard most of the time ... still, put me againt a wrestler and ill get schooled

[an123]

Don't need to be able to take down a wrestler... Just need to know how they take you down so you can get yourself in a much better position.