That's actually roughly the range of losses we focused on; but it was based on my rough feeling for reasonable loss rates (as well as on experiments where we caused losses in emulated environments), and a reviewer - justifiably - asked if we can base our values on realistic values. So I would love to have real value, I'm sure some people have these measured (I'm actually quite sure I've seed such values, but the challenge is recalling where and finding it...).
Also, latency values (under congestion) would be appreciated. Also here, we used a range of values, I think the highest was 1sec, since we believe that under congestion delays goes up considerably since many queues fill up [and again I seem to recall values around this range]. But here the reviewer even challenged us and said he/she doubts that delays increase significantly under network congestion since he/she thinks that the additional queuing is something mostly in small routers such as home routers (and maybe like the routers used in our emulation testbed). So I'll love to have some real data to know for sure.
Apart from knowing these things for this specific paper, I should know them in a well-founded way anyway, as I'm doing rearch on and teaching net-sec (incl. quite a lot on DoS) :)