I was well aware of this issue before buying my MY09 6MT, so my first drive was up and down greenhill rd (twistee/hilly road out of Adelaide) when I picked up the car, and plenty of hills work thereon. Mine still used plenty of oil early on - I took it in to the dealer at 1400kms and they put 700mls in, then wanted me to come back regularly so they could monitor it. At 2575 it took another 500mls, 3770kms another 300mls then 200mls more at the 5000km service (est I assume). After that it setlled down pretty well - I took it back at 7000kms and it hadnt moved much and they didnt add any more. I got through to the 12500 service with it only dropping from full (well overfull - the subaru standard it seems) to about halfway between full and add. Now at 14000kms and still reading way overfull.
The guy who was monitoring mine said the harder (accel and decel) the better - they had more issues with people that just used them on the open road during run-in. The rings need a good workout to bed in properly.