Block Radiator or Failed Thermostat or Normal??

I notice my FL V6 the lower radiator pipe is much cooler compared to top and radiator fins. I did about 1 hour drive, start and stop but the lower radiator pipe still not hot well you can say its still cool. I know that FL thermostat lat to open but is this normal as I cannot really tell what the temp of the coolant in top radiator pipe.
It has been a week like this (I only check this last week dont know how it was like before). Temp gauge still on the middle all the time (unless it is faulty), the coolant in over flow doesnt seem to boil. *touch wood*
Is this normal?

UPDATES:

drove about 50km on highway. the lower radiator pipe is cold maybe close to warm. any idea?

could it be the water pump?

I could see the water flowing thru overflow tank so I dont think its a water pump. I saw you have HGF problem. yours is 1.8 or V6? How do you go with it?

its a 1.8 and I'm hating it

water flowing thro header tank does not mean system is working correctly.