Fairly valid answers:
- Faster than your competitors
- Under 2 seconds
I’d go with #2 as I’m a believer in having metrics for myself independent of others’ performance. It just seems conducive to higher overall happiness.
At Google, we definitely aim for sub-two.
You can check your site’s response time from locations throughout the world at WebPagetest.org. For example, a user in Virginia with DSL needs less than a second to run the query [page speed] on Google.com.