Achieving maximum carry and roll depends on a number of compound factors that affect launch angle, spin, ball speed, ground condition (wetness, hardness).

For example, on a day where the ground is dry and hard a lower trajectory will create less carry but more roll, a higher trajectory more carry and less roll, when the fairways are wetter a slightly higher trajectory will create less carry but more roll than a lower trajectory.

It has been found that on average the best mean ball trajectory to give the best carry and roll is around 20 deg. To achieve this with a driver with say a 10 deg loft you will need to tee the ball fairly high and hit it with a slightly ascending blow.

So setting the ball high and keeping it forward does assist in longer drives but not because additional spin is applied but due to the fact that your 10 deg driver (for example) can then create a 20 deg launch angle this way. Now, you may ask "So why not have a 20 deg loft on the driver and hit through level" good question! The reason is that in doing so you will create more spin on the ball due to the additional loft which will create too much lift and make the ball carry and roll shorter.

I hope this helps you.

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Best Regards
Brian

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Funny o'l game!