LONDON (AP) -- Expectations that the London Olympics track meet would be filled with good times were quickly confirmed on Day 1.

Seven sprinters running women's 100-meter heats finished in 11 seconds or better Friday, led by the 10.83 turned in by world champion Carmelita Jeter of Gardena, Calif.

She was joined in Saturday's semifinals by Allyson Felix of Los Angeles and Tianna Madison of Sanford, Fla. Defending Olympic gold medalist Shelly-Ann Fraser-Pryce won her heat in 11 flat; her Jamaican teammates Veronica Campbell-Brown and Kerron Stewart also advanced.

Entering the semifinals of the women's 100 at Beijing four years ago, there was a grand total of one dash of 11 seconds or better -- Stewart's 10.98.