LDM performance vs scp?

This morning, I was benchmarking file transfers using LDM vs copying the same file with 'scp'. On the two files I checked, (1237KB and 2446KB),LDM took 3 times as long to send the file compared to scp.
Since I'm already short of bandwidth on my T-1 line, I'm quite concerned that I can not afford to use LDM.
Has anyone else benchmarked LDM to determine how fast it copies files, vs alternatives (ftp, http, scp)? 

Any advice on how to improve LDM performance?

--
Joe VanAndel    
National Center for Atmospheric Research
http://www.atd.ucar.edu/~vanandel/
Internet: vanandel@xxxxxxxx