they don't write (even on the linksys site) about backblane bandwidth - everywhere the same flat text. nothing about jumbo frames. well it seems to be what it claims to be - a workgroup switch capable talking with gigabit cards. don't expect too much in an audio environment under (heavy) load.
disclaimer: i like linksys routers to connect mac-networks to DSL/cable - never had the slightest problem, but we're talking about another class here