The grass is Kikuyu.
I could steal a line from one of the old Saturday Night Live sketches but Adam, I don't think you are right on this one ...
From The Guardian dated November 2009:
"In a major blow to South African pride in hosting next year's World Cup, stadiums used for top matches have been told to scrap their hardy African kikuyu pitches and switch instead to tender European ryegrass.
The decision comes amid mounting claims that the month-long tournament next June will be a "playground for Europeans'', providing scant long-term benefit to the largely poor country.
"FIFA decided that our pre-grown kikuyu pitch was not uniformly dark green enough for television so we have started again with ryegrass seed,'' said Pieter Cronjé, World Cup communication director for Cape Town where one of the semi-finals is due to be played."
From an Oregon Newspaper, dated June 2009 (The State of Oregon is one of the largest turf grass production areas in the world and home to many grass seed companies):
"When play begins in the 2010 FIFA World Cup on Friday, Benton County will be represented both on the field -- in the form of former OregonState University soccer player Robbie Findley -- and in the field, in the form of grass from seed provided by Corvallis' Seed Research of Oregon.
The company's South African distributor, Agricol, purchased about 165,000 pounds of seed for the World Cup, according to Bill Dunn, executive vice president of Seed Research of Oregon.
The company sent four varieties of grass, two of Kentucky bluegrass and two of perennial ryegrass, to South Africa for the event.
Dunn said most of the order was perennial seed, "and most of that was grown right here in Oregon."
At least 8 percent of seed at every site is from Seed Research of Oregon. At some sites, 100 percent of the seed is from the company. The process started last June, selecting the seed lots and arranging shipping. The first shipments went out last July.
...
Seed was planted through about January, so the fields would have about six months of growth. "We've looked at the turf and it really looks great," Dunn said."