Re: defining advanced: I like to use exrx's strength standards charts for the top lifts. Seems a good starting solid standard. Obviously you'll vary on categories in some lifts due to different limb lengths, etc, for example I'm in the elite section for deadlift but only advanced for squat, bench, press and intermediate or novice for snatch and clean. GBG, you can see on that chart that you'd be in the advanced class for deadlift, just barely shy of advanced in bench, though you've got some ground to make up in the squat area. Probably not built as well for squats or need some tweaks to your form or something. Still, quite impressive strength levels for those bodyweights. Clearly, you've been training intelligently for a while.
Clearly the length of time you have been lifting does matter to an extent but we all know of examples of those dudes who have been training like idiots for a decade. Then when they finally start training and eating right, they make their newbie gains even though it's been years since they started lifting. This suggests that it is progress made that matters more in determining how advanced you are, rather than length of time you've been lifting though both are important to some extent.
Anyway, yes, the studies suggest that protein synthesis is raised for a much shorter time period in more advanced lifters. Keep in mind that straight protein synthesis is not the only factor in muscle growth though.
Clearly the length of time you have been lifting does matter to an extent but we all know of examples of those dudes who have been training like idiots for a decade. Then when they finally start training and eating right, they make their newbie gains even though it's been years since they started lifting. This suggests that it is progress made that matters more in determining how advanced you are, rather than length of time you've been lifting though both are important to some extent.
Anyway, yes, the studies suggest that protein synthesis is raised for a much shorter time period in more advanced lifters. Keep in mind that straight protein synthesis is not the only factor in muscle growth though.