Netgear PLP 2000 - Slow speeds

Many things impact powerline speeds. 

1. crossing circuits drops speeds significantly

2. distance. The outlets might be right next to each other but be on different circuits. this means its signal is running from the outlet to the circuit box and back. it adds significant distance. and with distance, comes reduced speeds

3. interference. powerline is sensitive to interference. this includes:

• gfci outlets
• surge protectors
• arc fault outlets
• old/cheap/bad wiring
• high draw appliances
• electronics going bad
• some cell phone chargers

Powerline doesn't work well in all homes. It tends to be quite fast on the same circuit but once on different circuits, many things impact it. 

Its why i linked to tested speeds in your other post. Did you read through it?