I've been to a few presentations in the last months, and all of them have referenced the need for speed on the web overall and with emphasis with the amount of data we as devs are sending down the wire. This is clear as bottled Evian water.
In the last 6 months, I've heard a number of stats repeated during various talks, but one in particular was mentioned no less than 3 or 4 times (in separate talks) during Chrome Dev Summit:
53% of visits are abandoned if a mobile site takes more than three seconds to load
I 1st heard this form Soasta's Tammy Everts and then another time at a Progressive Web App summit. Finally, I tracked down the original study, commissioned by Google's DoubleClick. Some jaw-dropping stats were presented, of the P1 variety:
Out of the 214 average server requests per mobile web page, 107 are ad-related
You can read the entire study from DoubleClick here and be sure to table this at the next meeting with all stake holders present.