Hi, I'm new here and I know this is an old thread but thought I would add my experince.
I have been feeding bee pollen to my Rainbow Lorikeets for around 14 months now and have found a huge difference in them. I actually make my own lori wet food as I have been concerned over the huge amount of refined sugars that are in most commercial lori foods. So my food is refined sugar free and I include about 20grams of bee pollen to around 2KG of food, I also include about 8 grams of Super Greens (combo of spirulina, wheat grass, barley grass & Chrolella), 5 grams of dried kelp in the mix. It is mixed up with a teaspoon of native honey diluted in hot water and about half a banana pureed in. Four of my birds are breeding birds so their nutition is very important and I have noticed that since taking them off commercial wet mixes and using my mix that their feathering has improved dramatically the colours are more vibrant, they are also more playful and have more energy and their babies are reaching better weights.
I would not feel comfortable feeding Bee pollen to my non-nectar eating parrots though, unless pollens make up a large part of the diet in the wild I don't feel that it would be safe as they could have allergic reactions to pollens as we do.