"Did you compare this with any "control"? Did you close off the road, travel along a section of the road, recording your speed, whilst at the same time, measuring the exact mass of the car, the atmospheric pressure, the ambient air temperature, the air humidity, the wind speed, the wind direction - all with the OEM closed grilles fitted?
And then did you repeat all of the above with your chav-tastic open fog lamp grilles, with the identical measurements from the previous run - same fuel level, same air temp, same humidity, same windspeed, same wind direction?
No - I think not. In that case, your 1.27mph (was that measured to a recurring 10th significant figure?) means absolutely Jack Schit. An ant farting at the side of the autobahn could have a greater effect! "
....The problem is though that, no matter whether correct or incorrect regarding the topic, such language is guaranteed to cause a relatively aggressive reaction, T_T. Sorry, but you did ask for honest opinions.
Yes, I did ask for honest opinions, and I am genuinely thankfull of those.

I agree, but unfortunately, the quoted text on here doesn't show the whole story.

I initiated a response (over there) to somebody earlier in the thread who had recommended the open fogs.
My initial comment was a very neutral and friendly comment - sommat like "the open fogs are not a good idea". Someone else then jumps into the "discussion" with an extremely arrogant reply - and the way I read it was that 1.27 mph top speed was soley gained from using the open fogs. Two issues arise from that specific comment, and I reasonably, if a little harshly (but no more harshly than the previous poster had replied) challenged him.
The second issue, which I quite frankly couldn't be arsed to raise over there - was the sheer accuracy of the claimed speed advantage (not from all the controls which I had stated, but soley down to the accuracy of the speed measuring equipment). The mighty engineering resources of Ford, General Motors, Volkswagen Group, Toyota, etc, etc can NOT get a speedo accuracy down to zero decimal places, and actually allow for tollerances of up to 10%. Yet he was claiming accuracy of two decimal places. Indeed, apart from the very top levels of motorsport, most other classes of motorsport can only achieve two decimal places - and that relies on very expensive, and regularly calibrated specialist timing equipment. Furthermore, no GPS device can record speeds down to two decimal places. The US operators only guarantee GPS speed accuracy down to 0.5mph, which is a considerable difference in accuracy to what the poster on the other side was claiming!

And as a final comment on this point, lasers, which travel at the speed of light, are probably known to be
the most accurate method of measuring speed, yet police laser speed detectors only have an accuracy of 0.1 mph - ie, one decimal place, and not two!

Unfortunately, you do have a tendency to slip into such language and I've had to put up with it in the past in spite of enjoying your turn of phrase. However, I know you better now and don't take offence so easily. Having said this, I'm guilty of all sorts of posting indiscretions too!
I fully agree with all those sentiments.

By all means strongly disagree with someone but do you really have to tell them their sincere opinion "means absolutely Jack Schit"? I don't think you can expect others to respect your posts if you express yourself in that way, irrespective of whether your facts are right or wrong, or how strongly you feel.
But I was only responding in a manner and tone which the previous poster had used. Furthermore, I had given a very detailed, and extremely reasonable "counter" to what was quite simply a stupid comment. Then, rather than them trying to answer my comments, they simply returned with agressive bully-boy tactics and personal insults.
I'm just being very honest here in writing what I think in response to your original question.

Thank-you. And I've also read your "morning after" post too.

So absolutely no hard feelings to you Robin, or anyone else. I'd much prefer that we are all mature, and open and honest with each other. Even if we disagree on certain points, we all seem to be able to move on, in a mature, civilised, and most importantly, friendly manner.
Group hug to us all.