hi whiskers, my son is 9 and a half months old, he does some of the things on that list but not all,,,
stacking objects,, ha no chance, everything in his hand goes in his mouth
copying you,,, hes just recently started this, like copying noises we make and actions sometimes.
being close to drinking from a cup,,, again no,, he's only just started to hold his bottle himself (he's so lazy!)
using gestures,, although mom in law swears he waved bye bye the other day, im yet to see it.
understanding words, im sure he understands some words but if i ask him to give it to me he just sticks it even more firmly in his mouth lol
pincer grasp, ds has this down to a fine art now
tracing patterns,, no he hasnt done this as yet
ds also doesnt crawl yet although he tries but he finds it quicker to roll to where he wants to get

but he does stand for ages just holding to your finger and will take a few steps whilst holding on.
sometimes i read the milestones and what they should be doing at what age and think he has never done anything like that but ill read the next month on and he will do loads of that. sometimes i worry about ds's vocabulary as all he says is dadda, he could say mamma and nanna at around 7 months but dadda is all he says now (and he finds it extremely funny to shout dadda back at me when i try and get him to say mamma)
anyway all babies are different and they develop at their own pace, (and mine seems to be going at a lazy pace lol!)