Not if they're all using the same design and aesthetics. The approach here seems to be quantity over quality. To be honest, I don't expect the majority of these shrines to take more than 5 minutes to go through. Sure, there may be the odd shrine here or there that will take slightly longer, but I honestly doubt it would be approaching the length of a traditional dungeon which would be about 1.5-2 hours. Not only that, nothing suggest they will be themed any different to the shrines we've already seen.
The shrines are there to make up the numbers and plot useful points on the map to fill out the huge world. In fact I read an article from Aonouma just recently exclaiming that they could have added more dungeons in the game but decided not to and focused on the shrines instead. You know, I'd be okay with 4-5 dungeons if they were fully fleshed out. I know people bring up Majoras Mask only having 4 dungeons too, and that's right, but some of them were quite complex and not straight forward to go through.
I wouldn't be surprised if two of the dungeons in this game equals 1 dungeon from MM or any other modern 3D Zelda game. After all GI notes the dungeon are shorter than traidtional ones we're used to.