Could you tell us what airport you were flying at, the name not just some code if you will?
The FARs are clear, the glider has the right away over a corporate jet, except maybe in some class B,(TCA) airspace, or in IMC weather.
But almost all corporate jets fly on IFR flight plans, all the time, even in clear weather, and thus they get used to thinking every other plane is supposed to clear out of their way, and they are not very good at looking out the window.
They get complacent about having an electronic traffic finder on board to spot traffic which may work for other jets, but of course a I-26 doesn't have an electric system much less a transponder.
I fly out of Aspen, and it is normal that when approach control calls out my Bonanza to corporate jets, of which there are hundreds, they rarely see my plane visually until pretty close, if at all.
I have never seen a transponder or electric system in a I-26 or 2-33,or even in radio in one. Weight and complexity and cost are the opposite of the appeal of flying these planes. Many or most glider flying areas are more remote from where most jet traffic is.
I also fly gliders , mostly 2-33s in Boulder and fortunately there is very little jet traffic there. I do try to keep a good watch out as there are many other gliders and some other planes.