Yep, he seems to be in one of a kind shop in London, with all sorts of spam stuff being sold w/o any warranties. Maybe it's against the law to complain about crappy stuff in the UK.
I have talked to more than one person from bike stuff distributors and their opinion of sram is the same as RDV and the majority of bike shop service guys here as well...most really don't like it because in the long and short run, it costs them money. 'Warranty', at the bike shop or distributor level, isn't 'free'.
I suspect the gent in London is from a 'bike village', type superstore, just a small slice above walmart and costco in terms of bike stuff. These customers buy something and then either ride a lot or not at all. If they are number 1 above, they find a better, smaller shop that actually knows how this stuff works. And how to warranty a sram lever. I had a gent from said superstore, with a specialized, broken sram lever, and they wanted to send the entire bike back for warranty. yikes, I got a lever in about 4 days, put it on(not for free) and off he went. sram didn't even ask what happened, they just asked for my acct number, right or left lever, and into the mail it went.
But I'm making this up, aren't I?