As an employer, I would seriously hope this does become the norm.

If some employers want to implement recruiting processes that require developers to complete tasks that don't reflect real-world development, it makes it that much easier for other employers to differentiate themselves and attract competent developers who aren't interested or desperate enough to play these games.

Frankly, in today's market I feel sorry for any experienced developer who is going to complete a "programming test" in which referencing a website or book other than language documentation is forbidden. I reference websites and books all the time, and I don't know a single developer who doesn't.

Seems like the obvious (if dishonest) thing would be to use a throwaway phone # to get the test, then spend a day or so solving it, then type it in (with plausible delays) using your real number a day later. Assuming the test is roughly the same each time (even if details are different, it's probably of the same general class).

In grading, the results of 6-8h of work entered in 2h would look more impressive than 3h of work in 3h, I suspect.

(Sometimes I hate that whenever someone gives me a situation, my first thought is "how can this be cheated or gamed", followed by "what controls can I put in place to prevent that, and and what costs"; it's basically automatic.)