Industry standard for loading time of a website

Here are some Industry standard response time. This is very useful when we don't have any data.

Response time to display web pages:
- 3 seconds considered excellent
- 3-5 second acceptable
- over 5 seconds and it is not a search, considered unacceptable.

For a search transaction, anything upto 7-8 seconds is considered acceptable.

For web services, under 1 second is excellent.
Upto 3 seconds may be acceptable.