A surprise from PokerTracker: I Suck Shorthanded

[Nate tha' Great]

After suffering through some pretty serious computer problems over the past couple of months, and losing my PokerTracker database a couple of times over, I've finally got enough hands sampled to start to make a few cursory conclusions. All these stats from the Party 15/30 and 30/60 full-table games. However, I have frequently been playing the 15/30 tables when they get shorthanded.

What was surprising to me is how much worse my results have been when the game gets short. This is disturbing to me, since I "grew up" as a shorthanded player. The sample sizes are fairly small. But take a look at these numbers:

Between 2-4 players
Hands: 2672
W$WSF: 44.4%
VPIP: 41.1%
WTSD: 40.1%
W$SD: 43.9%
PFR: 29.4%
-0.05 BB/hand

Between 5-6 players
Hands: 2332
W$WSF: 42.0%
VPIP: 28.7%
WTSD: 40.4%
W$SD: 49.8%
PFR: 19.0%
+0.03 BB/hand

Between 7-10 players
Hands: 11,030
W$WSF: 39.0%
VPIP: 19.3%
WTSD: 37.4%
W$SD: 54.4%
PFR: 11.3%
+0.05 BB/hand

Some possible conclusions:

1. I radically overcompensate when the game gets short, turning into an unthinking, tilty LAG.
2. I have been running hot in full-table situations and/or running cold in shorthanded situations.
3. I'm now 4-tabling when I play, whereas I used to 2- or 3-table when I was primarily a shorthanded player. I do not presently have the concentration skills necessary to 4-table when a couple of the games are shorthanded.
4. Contrary to popular belief, the players who frequent the Party 15/30 full tables in shorthanded situations (as opposed to 6-max players) are a pretty tough bunch.

I suspect that all four of these things are true to some extent. But I'd be curious to hear if anyone else has experienced something similar, or has any other thoughts on the matter. The question is whether I ought to adopt a universal policy of dumping a table when it gets less than 5-handed.