Is The (xG) Table Lying?

It's five matches into the season and everyone knows the table is lying... but is the xG table lying? More specifically, what can statistics tell us this early in the season, what does it mean that statistics "become reliable" after a certain period of time, and how does this inform how we're thinking about Tottenham and Chelsea and Arsenal and Everton?

Caley's R2 charts:

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