This is an ongoing concern for me as Boost is expanded - not sure how fast that is actually happening, but at least incrementally it must be as we hear of new nominators...
Surely we will reach an event horizon where the entire top of the feed - as with Google paid results - is nothing but boosted stories. Everything non-boosted will sink to the bottom of the ocean like a dead whale, to be consumed by nothing but ghoulish, blind horrorfish and leech-like lampreys. (There may be the makings of a poem in that - wahey! Another 3 cents for me!)
Jan was actually OK for me on balance: joint second-best month since valid MPP stats start for me in July/August, but way down on December.
But without the one decently performing boosted piece, would have sucked. Picking up at the end of the month for some reason - yesterday (31st) was the best day since the mid-month boost faded.
Those are my anecdotal stats, for what they're worth, Robin.