We have updated our default ebay shipping method to map USPS First Class Package to "Standard". This follows eBay changes last week announced below:
USPS First-Class Service No Longer an Expedited Shipping Service
Starting the first week of May, USPS First-Class will be reclassified on eBay from an Expedited to a Standard shipping service. Expedited shipping services have an estimated delivery time of 2-3 business days and Standard shipping services have an estimated delivery time of 2-5 business days, and since USPS First-Class did not always meet the Expedited delivery time requirement, it is being reclassified. The shipping service name changes from First-Class Mail to First-Class Package.
Note that Teapplix provides a tool to override the default eBay shipping methods classification.