I have 3-7Mbps service (on paper, anyway) and never get to 7, I can get 5-6 maybe, but normally the speeds degrade to between 1-1.6 Mbps over a day or so. Like others, I need to reset the modem to temporarily get my speed back. Luckily (and this never happens), I called tech support and was able to schedule a visit by the tech early next week. I kept asking to start a ticket for a tech and after the 6th time the phone person obliged. Usually, and mysteriously, the line goes dead when you try to elevate the complaint. I'll be asking some questions. I'll have a report to post.
(added): Forgot to add this. I notice that performance issues here on the forum go unanswered or unresolved but stuff like webspace or email problems usually get a response. I'd like to know if this is policy or just lack of interest or just that these performance issues are not likely to improve so why bother. Any input on this?