I don't think the way they're trying to market themselves would make any difference; especially since some of the cards that Chase carries, including the sapphire preferred is considered premium.
and chase is now pulling on all MasterCard, any that was will be converted and any that were offered as mc before is only visa
unless you mean that MasterCard wants to pull back and not have their names associated with other banks, while American Express is branching themselves out to labels like Walmart and Wells Fargo--then that would make sense; I haven't heard of MasterCard announcing that they plan to be exclusive and run their own cc label along with processor mc.
my citi is still MasterCard and I like it, it's been like that for the past few years because lately others are using Visa. Visa moved it's offices to foster city and has been more on my radar sincehttp://m.bizjournals.com/sanfrancisco/news/2013/05/23/visa-inc-hires-jp-morgan-chases-ryan.html?r=full
also having the former head of consumer banking at Chase doesn't hurt visa in terms of networking either, besides the baby face there is also a charismatic smart man