I understand it very much depends on how guarantee policy, terms and conditions, type of cap etc. are set.
So, escrow doesn't really makes much sense if contributions are not refundable with soft cap and no specific obligations.
On the other hand, it show at least that the team has serious intentions to provide contributors with most guarantees possible.
It's like getting sec D approved. ICO team shows they've done their homework and have all intention to fulfill the project and meet the promises given.