According to Merriam-Webster:
flagship:
- the ship that carries the commander of a fleet or subdivision of a fleet and flies the commander's flag
- the finest, largest, or most important one of a series, network, or chain <the company's flagship store>
By (2), K10D, K20D, K-7, K-5, K-3, and K-3II are Pentax's flagship DSLRs. Note that "flagship" and "pro-consumer" are NOT mutually exclusive. The question "such and such is flagship or pro-consumer" is meaningless.
Having said that, who cares whether they are flagships, who even care D7000 or D500 is Nikon's flagship. If you like a camera, buy it; if you don't like it, don't buy it. Why getting hung up on semantics?
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Added after reading dcshooter's post below and after checking out rlatjsrud's old posts:
I'm sorry for feeding the tr0ll.
Request to Admin: Please give us a way to "thumb down" a post.