It's not a "forum claim" it's Car and Driver. You simply have to go to the forum link to open the source for Car and Driver.
You're right 0-120mph is exactly 0-200kph (124.27mph) but you're crazy (no offense) if you think it takes the 3MPS an extra 4.4 sec to reach 124mph. The 2007-2009 3MPS is simply A LOT quicker than 25.1 sec from 0-200kph period.
3.Again, the 3MPS (Mazdaspeed3) has recorded a 20.7 0-120mph tested by Car and Driver. It's bizzarre to think it would take an another whopping 4.4 sec to go that extra 4mph. It's simply untrue.
And lastly as I mentioned about the 0-100kph time of 6.1 it's FALSE. How on earth does a car that runs 0-60 in5.4 sectake an extra .7sec to reach 62mph? It makes absolutely ZERO sense. And since ONLY the 0-100kph and 0-200kph times are used when comparing cars the results are invalid.
Basically the site is under rating the hell out of the 3MPS / Mazdaspeed3. And I'm not saying it's just the 3MPS but other cars as well. I think we could use a bit of common sense a round up / down according to the posted results.
And lastly the weight and weight distribution listed for this car is DEAD WRONG.
Weight equal: 3152 lbs
Weight distribution: ~39/61