Re: And here we go again.
FTTN is rubbish but it cannot be "slower than their previous ADSL connections" simply because it's FTTN. The minimum spec for a FTTN line - 25Mbps down and 5Mbps up - is well above what any ADSL can provide.
The limiting factor for most end-users isn't the connection speed but the willingness of their own ISP to pay for enough capacity in peak time. What your modem stats show, what you get at 4am on a Tuesday, that's what NBN is providing to your house. If that speed slows to a crawl at 8pm on a Sunday, no amount of fibre will fix it. This issue has existed since the day the NBN began.