If Apple has a bad quarter with iPhone sales, every shareholder takes notice and a lot of verbiage is written to shareholders to explain why that may have been the case and what if anything is being done to correct sales projections for the next quarter.

Google doesn't have any products that are similar. Google mostly only answers similarly to shareholders if ad revenue is down. It would potentially take a lot to change in the world for any product to rival Google's ad revenue in prominence on shareholder reports.