Are they as active on the doors as I remember them in the 80`s, (when a territory map would be covered every month or two),
Every congregation is different.
In New York, where there are high concetrations of congregations in some areas (partially due to the Bethelites attending there), some congregations cover their territory every month.
In South Dakota or Idaho, where sheep outnumber people and there might be one congregation covering 5000 square miles, some territories are worked once every 5 or 10 years.
In general, in my experience in mid-sized US cities, people are a lot more eager to take 45 minute coffee breaks and ride around criss-crossing the terrotiry doing return visits now, as compared to the 1980's.