My almost 9 month old was just started on solids and today he ate MAYBE 1/4 tsp of sweet potato. Yesterday he ate the most of any day since starting and that was MAYBE 1/2 tsp of avocado and 1/2 tsp of brown rice.
I do only table foods and we do (sort of) baby led weaning, so I don't mash or puree or do baby cereals.
I guess I don't have an answer. My first son "tasted" foods till well after a year when he started eating in earnest. I am guessing this one will be the same too.
You will get lots of answers from lots of people. There are many that believe babies should be started early and fed well with solids. People in your camp who introduce late and BF will tend to be a bit more lax with the amount of food.
Wanted to agree with the others that right now it's all about learning and feeling and trying out new tastes and textures. It's so much fun to watch them eat and figure out new tastes and textures...and watch them toss every tiny bit of sweet potato from the high chair to the floor and see them enjoy every minute of it!
Enjoy!