Is it just a Taiwan friendship thing or is it what I think it is.
The only reason I ask is I’ve seen it quite often since I’ve been here, more so then back home (the states).
Well maybe it’s not the only reason I ask. It’d also let me have freakish thoughts while riding the MRT 
.
In Taiwan, girls holding hands in public is common and has no sexual overtones.
Similar to when foreigner in his/her home country bumps into a good friend of the opposite sex. A quick kiss hello is normal. Nothing sexual.
It means exactly the same thing as the fact that guys here walk down the street arm-in-arm.
this is not just a Taiwan thing, you can see this (girls holding hand ) thru out asia.
And boys! 
It means the two women are very close friends, it’s normal and accepted.
It’s even common in Europe, too, seen it many times and it’s just a close friend-ship thing usually among teenagers.
If they are male however they are either Bangladeshi *) or gay …
*) No offense intended, but they are the only ones I have seen doing it without being gay (supposingly) …