It's not just IBM: any of the larger enterprise consultancies should, at best, be regarded with suspicion. I well remember the EDS/UK Inland Revenue fiasco of the late nineties/early noughties, and there are plenty of other examples involving other big players.
If you think that all big consultancies fail so equally, then doesn't that hint strongly that maybe, just maybe, the issues are on the other side?
Consultancies mis-sell and misrepresent their services, whilst public service/government scopes the project poorly and is more than happy to buy into the fantasy. Every project is different so this is still an oversimplification.
Nevertheless, when an enterprise IT service provider is involved in a project it's often a red flag on successful delivery. Whether that's correlation or causation is up for debate.