"I am finding that under FMP10 Advanced, there is a 3 second delay when I instruct filemaker to print."
Are you selecting "Print" from the file menu or are you using a script?
If you're using a script, have you checked your script to see if there is something in your script that might be the cause?
I'd suggest all the normal troubleshooting procedures - printing to a different printer from the same computer, try the label printer on a different computer, run updates and patches on OS & label printer, etc. What label printer are you using?