"Twitter has built an audience, but in order to achieve the scale and revenue that Google and Facebook are seeing it needs to show that marketing dollars spent on the site can perform well for mom and pops, not just big companies, " said Jonathan Strauss, chief executive of Snowball Factory Inc.

WSJ: To Grow Big, Twitter Seeks Small Ads

Yes Andrew Strauss, Ian Bell and Jonathan Trott have got big runs but in the latter pair's case at no great speed.

BBC: Cricket World Cup: England's batting concerns

According to former Australia captain Ian Chappell, England's top three of Strauss, Alastair Cook and Jonathan Trott will have a big role to play in knocking the shine off the ball to allow Pietersen to come in and play his shots.

BBC: Ashes: Can England win down under?

After Strauss was dismissed for 41, Davies and Jonathan Trott, who made 69, combined to guide England onwards in a positive manner.

BBC: Andrew Strauss hails contribution of Steven Davies

Alastair Cook and Jonathan Trott both fell to the new ball and Andrew Strauss became Wayne Parnell's first Test victim before bad light halted play.

BBC: England on course for heavy defeat in Johannesburg Test