The fact that so many people are calling things "big data" when the data is not high volume (the most popular definition I've seen is the 5 V's definition--big

The fact that so many people are calling things "big data" when the data is not high volume (the most popular definition I've seen is the 5 V's definition--big seems to be a misnomer in this case, as only volume could really be called a measure of "big") lends credence to your statement.