do you live in the south oldspark? we see a lot of flooded batteries last about 4 or 5 years old in the shop, but not much more then that. we go from 100F to -30F year to year though.
but yeah ill definitely be expecting 5 years from this battery, yet i have a feeling it will last double that. especially since it could probably lose about half its rated capacity and i could still use it just fine for my needs.