Based on this article I suspect Chris, Taylor, David and Zeke do well, but Mari does badly.

http://www.ew.com/article/2016/06/21/survivor-host-jeff-probst-millennials-vs-gen-x-cast

Jeff talks about Taylor and Zeke from the POV of a producer spending 24/7 editing the show. "You will find yourself laughing not at [Taylor], but with him." "Man, [David's] storytelling is fantastic." "I think Zeke is a person people are just going to want to hear talk because he’s a really good storyteller and he has an interesting point of view on the show."

After bursting with enthusiasm about Mari in his pregame cast assessment he just breezes over her bio here.

Jeff kinda mentions Chris from a producer POV too, but specifically in terms of E1. "It’s interesting to watch [Chris] in these first few moments versus the Millennials..." which could be a bad sign. Except, he may well have been editing E1 in June when this interview was posted. What tells me more is he has a lot of enthusiasm for Chris, who also appears in the TV commercials.