Plenty of midfielders lack pace in the Premier League and it's not like Khedira is slow, he just has poor accelaration and turn of pace. Barry, Alonso, Arteta, Carrick, Scholes, Matic, Fabregas, Ballack, Makelele, Lampard, Keane, Viera, etc all weren't quick and nimble but are some of the greats of the Premier League. Ramires is just an oddity, a Midfielder with the speed of a winger.