I think that graph is biased towards the fact that the east coast is awake while the west coast is not. Also almost 50% of the US population lives in a state that touches the Atlantic.
Cloud: we have large appEngine (2000 req/s at peak - it's <i>very</i> up and down spiking), functions, and heavy pubsub/biquery. Didn't notice any downtime or large errors.
Last time there was cloud downtime Google wouldn't give any credit because it was still under the SLA. Though we're really small fish a tiny gesture of good will would have felt nice.
Hard to say. US populations are eastern centralized; west coast is only now getting to work, checking their mail, and searching bing for why google is down. You'd need a population + timezone forecast of that map to really measure regional outages.
No issues with any google services thus far for me in Denver.