So a lot of us are suffering from this issue to differing degrees, and it doesn't seem like much can be done to filter it from the signal. Would it not be more effective to try and find a way of preventing it getting into the signal/line in the first place?
Discussed to death many, many, many times .... LL. 
It's all down to the bottom line of the accountants sheet. We're pumping frequencies down cables that were lain decades ago, that simply were not designed to carry them.
Of course, FTTP is the ultimate answer, but it is NOT going to happen overnight.
I can't be bothered trying to reference it, but I read some years ago about some Oz scientist who managed to pump some astounding DSL speeds over bog-standard twisted copper pairs. He had basically eliminated all noise, but in laboratory conditions.
The problem we have as human beings is the fact we are needy and greedy. Just over a decade ago we could only expect 0.5Meg speeds, and today we can get 80Meg ....... but we still feel the need to get more. nothing wrong with that, it just won't happen right here ... right now like some would like it to be.
It still amazes me even now, when I attend a task and the EU has months of historical DSL stats and has collated information to say he should have 0.3 Meg more DS speed and his 'Ping' has risen by 2mS. I often think to myself, if you'd spent more time cleaning the disgusting pig-sty of a house, or got off your arse and got a job, then you might not be as obsessed with this ridiculous request you have got me to site for !!!
The difference wouldn't make any difference, when they are browsing .... if you follow my drift ??
you visited me then
just kidding. 0.3meg sync obviously is a lot if the sync is only 0.4meg, but if its say 60meg, then 0.3 as you say is nothing, so its a % game, and I wouldnt call an engineer for 2ms latency.
However one of the engineers who visited me I let him use the toilet, and after he left I was a bit embarrased as my bathroom needed cleaning and was a mess, so I did spend time to clean it up after he left. Rest of mny house isnt exactly spick and span either, so your comment is amusing as I wonder how often engineers visit a place and have to keep their mouth shut out of politeness when its a tip.
