From my family’s experience, I’d say it makes very little difference. My older daughter could use a mouse by the age of two, and the other showed no interest in computers till long after she was at school. Now they are 13 and 12 and both spend hours on computers, doing both educational tasks and playing. (The older one probably does spend longer at the computer, but she writes.) Both are adept at programs I am still clueless about.
If I was to go through the early years again I’d keep them away from computers as long as possible.