Okay after over 2 yrs of DIY and many arguments with friends over TH. I had them do a simple test to dispute the NiC=TH phenomenon...
Take 24mg/ml
non flavored nic in PG 10ml will do because ur going to take 5 ml and cut it to 12 mg with straight PG
Test vape each sample. There will be very little difference with 24mg having a more pronounced TH.
Now take 24 mg VG non flavored 10ml will do bc we are going to cut it to 12mg with straight VG.
Test vape each sample. There will be even less of a difference than the pg....
There is a reason with any argument for nic why there is a hint more diff with PG explained in part 2 of the test...
With the remaining of the samples add your favorite flavoring... Choosing stronger flavors will add to the test outcomes

My fave is menthol (hint)
The PG's should come out with with similar results TH will be increased with flavor but not as much diff as believed...
The VG's should not have any effect at all...
The next part is to take 24mg nic VG and cut into ur remaining samples to make a 50/50 mix.. Do your math keep 12 mg and 24 mg samples just want them to be 50v/50p
Here is where you will notice a great difference in ur TH the 24 mg flavored 50p/50v will be pushing TH in amount much higher than their straight versions......
The effect is the carry of flavor (density in size of vapor molecules carrying flavor in PG) PG carries more flavor bcause it carries less water (the flavor is not as diluted) there is less vapor with PG.
A good PG VG mixture will allow a heavy carry of flavor and nicotine with volume (filling of lung tissue) of vapor attributing to lung expansion with the VG thick Vapor. It is a well balance of the 2 with a heavy flavor that makes great TH not nic alone ( although nic does add in a small way)... You can push TH ( or in my opinion chest hit CH) with abnormal amts of cinn or menthol... This is more irritation than actual TH. Added fyi I do not consider harsh burnt hits as TH as it is an irritant not a natural effect of the normal operating limits of ecigs...
A cool little test to do