Indeed, both predictions seem to hold true for Japanese macaques (PDF).

The monkeys produced five pages of text, mainly composed of the letter S, but failed to type anything close to a word of English, broke the computer and used the keyboard as a lavatory.

After receiving the "go" signal, the monkeys were free to perform the task at their own speed.

For example, macaque monkeys are also highly social animals, and scientists put them in cages and taught them how to push a lever so that they could get cocaine.

To see how far back more advanced capabilities such as addition might go, researchers at Duke University in Durham, N.C., focused on somewhat distant relatives of humans—rhesus monkeys.