Overall stats (without timeout), 
last week (20110502 - 20110508):

Client loss:                        0.003%
Overall IPv6 dualstack preference:  0.260%
- of which are 6to4:                1.493%
- of which are Teredo:              0.136%
- of which are other/native:        98.371%
Overall stats (with 10s timeout), 
last week (20110502 - 20110508):

Client loss:                        0.005%
Overall IPv6 dualstack preference:  0.260%
- of which are 6to4:                1.240%
- of which are Teredo:              0.133%
- of which are other/native:        98.627%