I don't like ikea tables due to the compressed wood. I used to have one, the freaking table bend and warp after a few months with only a monitor, 2 speakers and me resting both of hands on it.
Was it this type?
Sometimes it's not the material, but design flaw. Without a proper frame/support, solid wood can also warp and bend over time. This type is both material and design flaw. Lol. Only the frame/structure is fibreboard. It's mostly air and cardboard/paper inside.
In their own words:
Table top:
Top: Fibreboard, Acrylic paint, .
Frame: Particleboard, ABS plastic
Filling material: Paper
Bottom: Fibreboard
Older version was called VIKA if I remember correctly. Avoid unless for very light or short term usage, e.g., rental apartment, etc.
http://nickerwin.com/2014/06/ever-wonder-whats-inside-of-an-ikea-table-top/
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Not all their items are made equal, some are really use & throw away type, some are decent value. I'd say their office range tops are better designed for heavy loads. Made of MDF, which is a fairly standard material used by most offices for desks tops. Of course, there's the metal frame too, which muddle pointed out.