I've seen the document you refer to, and it's latest report is the jQuery for version Q3 2014. It doesn't say anything about versions after that. It's still 1.11 for Q1 2016?
For almost every prior release, the page shows that the jQuery version was upgraded. But for the last 5 release, there are no updates of jQuery version? Seems odd.
I was under the impression that, like a lot of tools, support for older IE versions was being phased out of the telerik asp.net control suite. Meaning you could move to the far faster jQuery 2.x versions. Is there any timeline for that?