>Has the fixie grommet weirdness come to the UK?
Fixies aren't that uncommon in London, and it's been that way for some time AFAIA.
Re recumbents - I've got one - together with various mtbs - I had to give up my road bike some years ago after riding it set off some neck muscle spasms - it's not been the same since. An mtb is just about ok, depending on the day.
There's two parts to 'recumbents not being that fast'. I suspect a lot of people come to them through injury/comfort (etc saddle sores) - particular re touring. So they're probably not yer average fast roadie whippet to begin with. Judging by one US forum (bentrideronline.com) the old/fat/beardie (sandals optional) stereotype is at least partly true. But to look at it another way, if you're..ahem..large, then a normal saddle is probably less likely to be comfortable. Also the relative cost of a recumbent - whilst not more than a particularly nice road bike - is perhaps less likely to be offputting the older you get (and perhaps paid off the mortgage !). Not to mention if you're a bit older you'll probably not be too bothered what anyone else thinks about riding one ('I wouldn't be seen dead', etc).
That's the engine kinda covered, now the bikes..
Most recumbents tend to be intended as commuters/tourers - so tend to be a bit on the lardy side - and even just losing the jersey pocket space means you'll probably be using a rack of some sort (extra weight). Having at least rear suspension prevents some road shock from hitting your back - tho' it's handy on the front too. Some manaufacturers are in the Netherlands - weights not so much of an issue if it's dead flat.
That said, one Netherlands manufacturer - Challenge- also produce some of the lighter bikes around (SL range), at about 22-23 lbs (compared to 32-ish), by using variable tube thickness, thinner guage seats, and carbon fibre - but they're not *that* significantly more expensive than the rest of their offerings - the difference is load weight and - I'd guess - crash damage resistance - but they're still got a 10 yr warranty.
Trikes tend to be a little heavier, unsurprisingly - but if you're in a really low gear for a climb, at least you can't fall over
There's assorted carbon fibre mid/lowracers around, they are somewhat more expensive - cf lowracers especially are really aimed at racing, and tend to suffer from low ground clearance and limited turning circle if used on the road (not impossible though).
Another engine-related issue - if you've gone from a DF to a recumbent, muscle usage is somewhat different, legs only. The position's more 'open', I find my hamstrings contribute less, but the vastus medialis - front/inner muscle about the knee - gets more grief. After a summer's commuting (mebbe 20+miles/day, 3 days a week) - if I miss a week or two it's back to feeling like I'm doing less presses ! Meanwhile last week I was back on the mtb having not touched it for over 6 months, and had a 4 days of pretty fast commutes. It takes a reasonable time to become acclimatised to one, and I suspect a lot longer to actually become fast on one..which may be relative if it's still a heavy bike..
Complicated ? - not really, transmission's the same, suspension (if present) is pretty basic, my rear airshock was off-the-shelf. It's just a bike. Yes, there's some unique parts, if that means the frame/fork/seat/rack.
Visibility ?- there's the WTF? element, most drivers give a wider berth, I get less stupid passes than I do on a DF. Even on my lowish bike - an hpvelotechnik speedmachine - your head height's about the same as that of the driver of a Lotus Elise, MX5, Lotus 7 replica etc. You can't filter in the same way as on a DF and your view of the road's different, but you ride differently to compensate - not a problem.
Err...I think that's covered most of it
