Blueberry plants don't always flower much the first year, and I usually leave them. However, like strawberry plants, blueberries are establishing a root system during the first year or so, and it is beneficial to remove flowers to divert the energy sources toward something that will benefit the plant. There are some cases where I've had to start pinching flowers because the plants weren't growing at all, but loaded with berries from year 1.
So if you don't have a huge plantation or something huge, I'd recommend pinching the flowers the first year. Blueberries are a longer term plant than strawberries, so anything you can do for them in the beginning will greatly help the plant later on. Under good conditions, in 5 years or so, you might have a 6 1/2' giant bush producing over 20 quarts per plant.
I've found that in less than ideal conditions, potted blueberries adapt a lot better than bareroot plants. Actively growing potted plants with leaves aren't going to flower, dormant stock might. Look for a significantly wider bud. Or if you're planting in the fall, which is a good idea, you could get flowers from bed or pot grown plants.