Small correction - that table 1.5 vs. 12 was from some other test. This is what I meant to post (hfsc, tbrsize 12k, bandwidth/realtime/link/upper set to the same value, although anything besides upperlimit didn't matter much):
theoretical / actual
8 / 8
10 / 10
12 / 11.95
14 / 13.24
16 / 14.13
18 / 14.18
20 / 14.27
22 / 14.16
24 / 14.50
26 / 14.70
28 / 14.60
30 / 16.36
32 / 16.48
34 / 16.38
36 / 16.39
38 / 16.38
40 / 17.28
42 / 18.88
44 / 19.46
46 / 24.82
48 / ~25.5
50 / ~27
