see attached

Output is good.  No line errors.  

1801 router can handle speed of up to 17.5 Mbps upload/download traffic (no encryption).  

When you are doing the speed test was this done during the day, peak times, night times? 

Can you post the output to the command "sh interface dial0"?

Thank You Leo - let me know if you/anyone notice anything for the below:

(btw test speeds do not go over the 6Mbps download (day or night) while ADSL line should be at least double this download speed)

Dialer1 is up, line protocol is up (spoofing)
  Hardware is Unknown
  Internet address is xxxxxxxxxxxxx
  MTU 1492 bytes, BW 56 Kbit, DLY 20000 usec,
     reliability 255/255, txload 13/255, rxload 1/255
  Encapsulation PPP, loopback not set
  Keepalive set (10 sec)
  DTR is pulsed for 1 seconds on reset
  Interface is bound to Vi1
  Last input never, output never, output hang never
  Last clearing of "show interface" counters 6d15h
  Input queue: 0/75/15/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/0/16 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 42 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 3000 bits/sec, 0 packets/sec
     13713069 packets input, 2681963957 bytes
     9481066 packets output, 1081265925 bytes
Bound to:
Virtual-Access1 is up, line protocol is up
  Hardware is Virtual Access interface
  MTU 1492 bytes, BW 612 Kbit, DLY 20000 usec,
     reliability 255/255, txload 4/255, rxload 4/255
  Encapsulation PPP, LCP Open
  Listen: CDPCP
  Open: IPCP
  PPPoE vaccess, cloned from Dialer1
  Vaccess status 0x44, loopback not set
  Keepalive set (10 sec)
  DTR is pulsed for 5 seconds on reset
  Interface is bound to Di1 (Encapsulation PPP)
  Last input 00:00:00, output never, output hang never
  Last clearing of "show interface" counters 6d15h
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 10000 bits/sec, 14 packets/sec
  5 minute output rate 11000 bits/sec, 13 packets/sec
     13713311 packets input, 2682029659 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     9481298 packets output, 1081290311 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions

Last clearing of "show interface" counters 6d15h

Ain't going to help because the counters were cleared 6 days ago.  

The current output shows no congestion and shows no output drops.  Based on this output, I see no evidence the router is having problems.