>>>In most environments option #2 is preferred because the JetDirect has a limited amount of RAM to buffer print jobs; if that fills up it reports "busy" and print jobs seem to finish slowly.
>>
>>We are running the reports on a W2K Server box. This box prints directly to the JetDirect card as the properties for the printer indicate the port the printer is on and this port references the IP address of the JetDirect card. I don't know if there is a better way to do this. I haven't ever seen any "busy" messages when we look at the print queue.
>>
>>>
>>>In Advanced...Print Processor you could try setting data type to EMF rather than the default RAW, this may reduce total data volume sent to the print server/printer.
>>
>>I tried this but no change.
>>
>>>If there is any bidirectional support in the driver, turn it off.
>>
>>I tried this as well but no change.
>
>At this point you'll need to talk with your network administrator and dive into the details of the server/JetDirect configuration.

I finally figured it out! It turns out that the default for a LaserJet 4 is 600 DPI while for the LaserJet 3 it is only 300 DPI. When I set the 4 to 300 DPI the speed increased to that of the LJ 3 (although the quality of gray shading was lower than for 600 DPI, but for this app that's not a big deal).