is it true that woods with uneven grain (bird's eye maple) are weak and more prone to warping?

is it true that woods with uneven grain (bird's eye maple) are weak and more prone to warping?

I don't know, but I have built several 1 piece birdseye maple necks 5ers without problems (or complaints from the owners!)

If they make bird's eye maple fingerboard i think its stable although i never saw a birds eye maple neck, but thats only because theres no point in making such a neck, i mean, instead of so much wood used on neck u can make more fingerboards out of it, my opinion :)

It seems strong enough.

Actually, many interloking grain woods are more stable because of the stress in them, once you cut it and the stress goes out it is jointed and planed (trued) it is very stable. You can check out material on grain arrangement and how the wood tends to move in responce to moisture and grain pattern.

The very basic idea is boards cup in the opposite direction of growth rings, warp happens when the board is sawn in a way that the grain changes from horizontal on one edge to vertical on the other (extreme case) Quatersawn (IIII) and rift sawn (/////)are the most stable, same applies to burls, curls, flames, birdseyes, buckeyes, quilts, spalts, but the stress of interlocked grain will counter effect of warp somewhat.