deployment area for 15mm

In the rules book it states that troops must be deployed 30U from the centre line and 12U in from the sides.

However in the Tournament downloads it says that for 500/400 point tourneys it says the deployment area is 40cm from the table edge - thus for a 6 by 4 table troops can be about 20U from the centre edge.

Is that correct?

Doesn't it result in the majority of terrain being in the central channel between the armies - even more so than before?

the fowarded deployment is just to have faster games, that in a 1 day competition are needed.