Yeah they run people on an 'upgraded' profile of 9210kbps (or variations of that) for a few months, and then 'downgrade' them to the actual 8190/8192 profile. Being almost a 1mbit downgrade, the difference in speed is definitely noticeable and most people mistake this for a dip in performance when instead it really is PTCL normalizing your params to actual.Bro you are not the only victim here yesterday these PTCL A**holes downgraded my actual 9210Kbps line profile to 8190kbps and I used to get 960kbps on my previous profile and now I'm hardly getting 800kbps, although I'm a 8Mb package user. But these morons has refreshed everyone's port and now we can't get 950+ kbps speed like before. I restarted and did everything in my power and after calling my DSL guy he told me the whole story that why profile was downgraded to actual 8Mbps link.
It sucks, I know, for them to give you a taste of what good feels like and then take it away, but you can't really fault PTCL for doing that.