Very sorry if this made anyone feel uncomfortable in any way. My apologies.
Thank you for your apology. Our Rainbow Bridge section is a virtual place of memorial and should be treated with the same respect and sensitivity you would show their physical equivalents, which is why I felt it necessary to move your thread.
You are welcome to go through the threads in the Rainbow Bridge section (which with over 4000 threads should be significant enough to be representational) and look up the ages on your own if you wish to do any more serious statistical research - just the same as you can visit any human cemetery to look at the ages on the grave markers in order to get a rough idea of the life span of the area's inhabitants and what it says about the general living conditions of that community; but you would never think of personally asking cemetery visitors about the age their beloved ones died at, would you?
You are however perfectly fine to raise this question in Guinea Pig Chat where there is no direct connection to a loss a much as you are fine to talk about human, a community's or your own family's general life expectancy in another context. It is actually a surprisingly interesting field of social as well as historical research.
I have lost my mainly rescue adoptee piggies at pretty much all ages; good normal care and a mainly hay and not vegetable and pellet-based diet can prolong the average life span by around 1-2 years in my own experience and take a healthy piggy from the lower end of to the upper end of the average life span whichs seems to peak at 5-6 years. You will also find that the average life span in different social media groups can be influenced by the level of care and diet promoted by each group and where they are generally sourcing their piggies from.
What you can never do anything about are genetic issues, vet access/bad timing of illnesses or quick declines that would have needed an exotic vet or an emergency op, conditions that are beyond the current veterinary abilities, sudden deaths etc. which can all happen at any age. Guinea pigs are prey animals and wired to suppress signs of illness as much as possible. By the time they no longer can do this, they are usually already very ill and well advanced. They also have a much faster metabolism than larger predatory pets, which turns against them in illness and old age as the veterinary system is not laid out for that and many medications take some time to kick in fully.
In my own long term experience, my younger age losses below 4-5 years roughly balance out my piggies that have lived beyond 6-7 years.