Curious.
I'm not so sure that I would place much credibility (or worth) on such surveys; for that matter, often, when crafting surveys, the answers depend on the questions asked, and precisely how the questions are framed, as well as the priorities of the people who have asked these questions (and commissioned the surveys).
Well, in any case, perhaps oddly enough, a guy with a cracked phone screen (this has been known to happen to my brother, a lawyer, whom I adore - he is left handed, and has been known to drop phones by accident) is not something that I would view in a negative light. Instead, I would content myself with the observation that, perhaps, a protective case for the phone might have been a good idea.
Having said that, I prefer a cracked screen to a spotless screen wielded by an uptight, and judgmental individual.
More to the point, I'm old school; I'm of the opinion that mobile phones (cell phones) should be banned entirely from the coffee shop (table of the coffee shop), pub, or while dining in a restaurant, or dinner table at home.
Put the phones away (irrespective of whether it is a battered antique complete with cracked screen or an antiseptic, immaculate, and absurdly up to date version) and engage in cultivating or nurturing the (dying) art of intelligent and interesting (dare one say even witty?) conversation.