In reply to lowersharpnose:
> The top 3 have not really been the top 3 run scorers very often.
It's not their only job, easing in the new ball, gauging the pitch, testing the fielding side are also important. In recent years we have relied on a strong middle order to keep us on track and it's more often the case that careful batting has kept us in the game while the bowling wins it for us.
However, it's not unreasonable to expect to crack the ton before we've lost the first 3! Look at the 2012 series of Australia vs Sri Lanka. First test the Aussies were 183-3 and 153-3. 117-3 in the second test. Even when they lost to India last year they still managed more than 100 for the first 3 wickets in 3 out of 8 innings.