That's how long it takes me to hum the theme of Jeopardy including the final two bump bump. That is an absolute worst case scenario of how long something should take to come back.

Websites should load within about 2 seconds but I'll give them 18 seconds. Then I will abandon them.

When I coded interactive systems, two breaths was all I would allow for a result to return before figuring out how to do it faster or throw it into the background. I always targeted before someone lifted their hand off the enter key.

When I was doing that I was splitting a single 386 chip between 30 people with 16 megabytes of memory. It was running their full screen interface as well as everything else in the database. Everyone was running Oracle queries constantly simultaneously as well as updating the shared database. Everyone was typing into and the editorial interface running on that chip. The devices we hold in our hands are a hundred times more powerful. Non network local stuff should not lag in the slightest. Websites will lag depending on how stupid the people on the back end are combined with bad network connections and latency.

You said 60 seconds? I don't believe you. I think you get annoyed and frustrated after 20, possibly less. Start counting as you wait for web pages and get back to me. What's your real number?