Note that, while the first model is the only one that has to move the shortest distance, the other models still have restrictions on their movements, namely that first they must assault unengaged enemy models, then models that are engaged, then just move within unit coherency. So you would find it very difficult to completely surround a unit with your own, even if it could do any good.
"Trying to make some sense of it all,
When I can see it makes no sense at all"
"Fools to the left of me,
Jokers to the right,
Here I am,
Stuck in the middle with you."