Can confirm with some anecdotal evidence. Had to work with them once for a client. They were hired to create some web services.

All they did was constantly spew out enterprise-y business bullshit statements, while trying to delay, stall, do as little work as possible and extract as much money from the contract as possible. (this was some semi-public funding gig)

In the end they delivered some nodejs application, granted it works and does it job, but the amount billed and time invested was insane if you ask me.

Much more focus on lobbying, talking, overselling, making things sound "proper and official", than actually being helpful with the engineering.

I just came off a contract where I was subbed to Accenture, I was on the previous contract and they "inherited" me. Can confirm all this. Accenture's model is to wow the executives with slick presentations, buzz words, and name cachet. Then they bill insane hours designing and "solutioning" from many people who maybe log into the client network once a week but spend the rest of the time on the Accenture corporate network, maybe doing work for the project, maybe doing nothing, maybe double billing on another client, who knows? They can get a greenfield small app going at likely 5x the cost it should be but decorated with all sorts of fancy docs and presentations and runbooks and guides but on my project they tried to leverage that experience into taking over a large, established, legacy, enterprise system and from what I hear they are basically spinning in place doing nothing.

Ex-Accenture here. Software devs (at the grunt level at least) would almost never work for another client at the same time as your main client. I only ever met one person who worked for two clients simultaneously, and IIRC they were management/admin level. As far as I know, they didn't file double-time as described in your comment.

Internally, the hour billing tracker (disgusting old thing) would limit you to 8h per day total anyway, so you couldn't just bill 8h to Project 1 and another 8h to Project 2, because it would scream at you that you're trying to file for unapproved overtime (which would cost ACN money). It's anyone's guess how this data would be presented externally to the client, but I like to think that they wouldn't bill for 8 hours externally when the internal record shows only 4 hours was worked.