We just finished our caminho Portuges started May 6th in Lisbon,ended June 7th at Santiago.
Great walk..beautiful scenery and so kind people you'll meet.
We only met two British ladies at the Lisbon airport ,showing up the Santiago badge at their backpacks. We had them at our backpacks too but never got any reaction.
Most people we met were Germans,some Irish and some Brasileans. It looked like they never had heard of this forum.
Anyway enjoy your walk,whereever you start..we liked the first part from Lisbon the best..very quiet
If you start from Porto, follow the river from the center to Matosinhos. It's great. And then follow the coast to Vila do Conde and from there to Rates. Eventually sleep in Matosinhos. Hostel Central is a great place and not expensive and you are close by the bridge that links you to the coastal route to Vila do Conde
Bom caminho