I feel for you. Luka just turned 6 months, sat unassisted (for minutes at a time) at 4 mos. and has been crawling and pulling up for two weeks now. AND has 2 teeth! Poor me!
This is new territory for me, as Julian was perfectly average in milestones at this age. Sat at 5 mos., got first tooth at 7.5 mos., crawled at 9 mos., walked at 12 mos., etc. Julian is super smart, creative, and athletic at 3.5 so I can't imagine Luka's early achievements mattering much in a couple of years. It sure is funny and scary now, though! If only he didn't have such a good dirty shoe radar, it'd be okay.