That's partly because of the influence of institutional investors that use earnings and earnings estimates for calculating the fair value of a company's shares.
But note; this ratio can vary widely from industry to industry.
The Growth Scorecard table also displays the values for its respective Industry along with the values and Growth Score of its three closest peers.
Here is where the tried-and-tested Zacks Rank stock-rating system plays an important role, as it effectively harnesses the power of earnings estimate revisions.