Loren, during the break-in period, be sure not to spend the whole time at one RPM (like w. cruise control on). This will unevenly breakin your car to that RPM. The important thing is to vary the RPMs, even if you occationally get above 4,000RPM. (The "don't go over 4,000rpm and you'll be fine" thing is not too accurate - at least not as much as with older cars).

marria01, the break-in period is 1000 miles and has caused many WRX owners to seek professional mental help.