Guess its probably slightly different characteristics of the carb vs the injector engine, resonances, etc

Its a fairly constant noise increase from about 35mph on upwards, but there's little sounds that come and go (but mostly come) as you accelerate, making the engine get appreciably louder than eg the tyre noise.
In my case, it has one noticable hike *just* as you reach an indicated 40mph, so the quietest cruising of all comes at around 38, probably about 36.5mph real speed, exactly on 60kph?... (projected to about 45mph with theoretical 5th

) ... then whatever buzz or whine is there decreases a little, or at least is absorbed into the general rising background noise til the low 60s... from 63 thru maybe 67 it gets quickly a lot.... whats the word... hummier, dronier, something like that. Starts to penetrate through the stereo. But thats fair enough seeing as it's sitting at 4000 revs when you drive the legal motorway limit.... 65 is about the best balance of not falling asleep and of mind-drilling resonance. With 5th, that particular blend wouldn't be back around til 75 and the tyre/wind noise would be more of a problem then.
(It's also got a lot to do with throttle position of course.... which may scrub off a little of the benefit if I have to use a wider setting in high gear... if i try to keep a constant 70 it's VERY noticably boomier than low 60s going uphill)
Over 80 its a wailing banshee; past 90 it's a howling banshee being drowned in a bath of boiling acid.... but again thats because the revs are about where the speedo change-up marks are for the lower gears... and you have no choice if you want to go at those speeds, itd be 4th or nothing past ~130kph, really (well... you might make 85mph, but would lose it *immediately* on reaching a hill).
Anyway I dunno if it's the couriers this time... I think the blame probably lays with the breakers. If it all goes to hell and it's tracably their bad, then I'll put their name up as a warning. Or it might be that first their couriering firm, and then the royal mail (apparently the parts are small enough to post) have screwed the two of us over.
I'll see what the situ is in the morning. If no bits, then screw it..... i'll say with the 4-speed massive and get my money back by hook or indeed by crook (or by complaining vocally to BreakerLink

). I'm not putting the clutch or exhaust repairs back yet another week. At least then I'll have those 'is it the clutch or the linkage?' answers for you!
Cuz seriously... having it done now was to save both cash and hassle. If it doesnt happen tomorrow, then it'll be far easier and cheaper to buy another polo with 5sp (and 1.3? or a whole different car..

) and sell this one on after taking a weekend to tart it up a bit.