maybe the score is built up over the time and duration you’re logged into google ?? i just checked my score it’s at 0.9 while always being logged into google and 0.7 while in incognito in Opera browser
I wouldn’t advise focusing too much on the score returned by the example page. That example is intended to show an approach to implementing the v3 API using the PHP code hosted here. The score returned is specific to that particular request and is not an indicator about the status of your Google account.
When using the v3 API on your own site, the score indicates the confidence in which the service has that this is a non-automated request. It is not a definitive answer, only an indicator. A low score can be used as a prompt for additional verification on an action - for example, a confirmation SMS - rather than blocking a user entirely.