This is late, but...
I hope for the 2010 Macquarie Dictionary they've appended the definition of the word 'epic' to include "Top Gear Special Challenges".
People may bitch and moan about the wavering/falling quality of the standard shows, but the boys' track record of striking automotive comedy gold when they go OS with the budget and time remains thoroughly intact.
The show was an absolute ripper. The scenery, the cinematography, the one-liners from James (!). Hugely funny stuff. Wouldn't it be wonderful if every TG ep could be like this?
Instead of talking pointlessly about what was fake and what wasn't, I thought I'd just make the following observations.
1. The show was fantastic, but it didn't make me feel the same was as the Botswanna, Polar and Vietnam specials. That's not to say it sucked, but it means we're talking 12 out of 10 rather than 14 or 15 out of 10. I watched the other ones again recently and there is just something about them that pips the South Americian special. The African special was the first and unprecedented, so the sense of epicness was unfathomable. It also felt very 'complete' and nicely paced, as did the Polar special, which was also just bone-crazy in its premise. The Vietnam special holds something dear to me for some reason, probably because I was in the country when it screened, several of the places I'd been to myself and I guess I just love the place.
I'd call it on par with the US special... some incredibly crazy and amazing bits but ever so slightly let down by being rushed or oddly paced in spots. Things like James crashing into a village well being passed over in 2 seconds - surely there was a funny story there? Was there so much material that nuggets were tossed to fit it into 75 mins? One can only hope they do an extended DVD release.
2. Current so-called issues with quality and consistency in the last couple of seasons appear to be mostly centred on time and money (which, in TV land, are the same thing). Give the guys a shedload of cash, a month in the jungle and 4 months in the edit suite and they produce the goods no worries. Give them a wet British road and a 3 person camera crew for the afternoon.... and chances are we've seen it all before.
3. Where Clarkson and Co go now for the next challenge will be interesting. The 3rd Law of TV Physics states that epicness is directly proportional to time, which is a fancy arsed, bullshit way of saying each Special should outdo the last... whether or not that's happened previously is open to debate, but one has to think they're quickly running out of epic places to circumnavigate. Options I can think of include:
1. The outback in Australia (harsh but no more so than Africa, plus the Greenie issue down here is a concern).
2. Trans-Siberia
3. Antarctica (would be a bit too much like the Arctic Polar Special, albeit probably harder ie. all overland no frozen seas)
4. Homemade amphibious vehicles island hopping across the Pacific
5. Drive up Mt Everest (yeah, OK, not gonna happe...)
6. Around the world in 80 days/cars, aka the now discounted movie rumour.
I guess it is better to be a victim of our own success than a victim of being resoundingly crap.