I say totally illogical, but maybe that isn't quite so. If there's no detrimental effect in signal quality I seem to to remember reading somewhere (Bald_Eagle?) about lightning strikes where on more than one occasion the SSFP took one for queen and country, the ultimate sacrifice, and the modem survived.
Yes. Your memory is correct.
I'm currently on a Mk 2 SSFP.
When my SSFP was initially switched from a Mk1 to a Mk 2 a very long time ago, I did notice a little speed reduction, but slightly improved stability/reduced error counts.
From what I have read, the Mk3 SSFP has improved filtering, but potentially at the expense of a little bit of speed.
For users achieving high speeds say the full 80 Mbps on a VDSL2 connection, a reduction of 8 Mbps (10%) is probably negligible.
However, the same 8 Mbps reduction for a 22 Mbps connection like mine would be very noticeable indeed & would equate to approximately 36%.
However, I'd still prefer the SSFP to sacrificially cope with lightning effects etc. rather than the modem or even the PC.