[Sephiroth]

So - I switched to router mode with the following observations:

1/
Initial issues logging onto the Sh. Once overcome, they did not repeat.

2/
Airport Extreme connected in bridge mode. DS speed > 100 meg; upstream speed c. 1.2 meg.

3/
Moved PC to SH port 2; same poor upstream speed.

4/
Logged onto SH wireless OK; decent 2.4 speed; Changed WPS key; then couldn't log onto SH wireless. Airport Extreme wireless OK.

5/
Reverted to modem mode. Upstream speed immediately jumped to 5 meg.

So perhaps this'll start off other people's R37 observations.