I read through the other thread and could only conclude that a small number out of the people polled raised this concern (Not exactly "everyone"). Like the AP1, DC2 and DC5 gearboxes through my experience, 1st - 2nd gearing is or was constantly a concern by owners. But Honda issue TSBs to both the S2000 and DC5 not including DC2 to help improve the situation, in short this also often came down to maintenance/care and fluid application to improvise on the shift/gearing feel even with TSBs don't fix the on-going concern.
Out of the responses made on the other thread, here are the common types affecting shift/gearing feel with my appropriate recommendations. Note, I have never applied any TSBs to any of the following 4 types of cars owned and currently still own over the years - AP1, DC2, DC5, CL9. I hope this helps to give you an understanding.
- Weather/Temperature | Like I've mentioned above about OEM tranmission fluid chracteristics and behavior, the selective use of speciality transmission fluid can reduce/remove this problem but pricing premium and more constant interval changes will be required to maintain the same level of consistency moving forward.
- Shifting/Driving Methodology | Also related not directed at RPM change level, this seems to be the most common reply although most practices I would not condone (Ala clutch dumping, "shifting with authority?" etc), period. My suggestion is to do one of the following - Rev Match or Double Clutch when shifting, you'd find that shifting will be more precise and accurate not only to reduce gearbox/transmission synchro wear.
If you need further information on fluid application to match what is available to you locally, let me know.