I'm using the Chrome developer tools to review a web site for a client, and it would be nice if I could export the results of the time graph.
Is that possible?
Assuming that you're referring to the waterfall chart output in the network
panel, you can right-click on the chart's header (or any empty space in the chart itself), and select "Copy network log as HAR" to pull the chart's data into your clipboard.
HAR is a format that lots of tools understand; to generate a nice waterfall chart to discuss with your clients, take a look at something like HAR Viewer. I think that will meet your needs.