Quick Lightning Channel Stats (31-Jan-19)
My mainnet node sees 23304 unique channels (technically 45958 half-channels) from 2902 nodes; mean capacity is 0.027 BTC ($US92), median is 0.005 BTC ($17).
Mean fee is 960 millisatoshis + 190 parts-per-million, median is 1000 millisatoshis+ 1 ppm. (I trimmed outliers, and rounded). This shows that most people are running with the (lnd/c-lightning) default fee settings:
You can find the raw data on my webpage.