If that is the level of the lag that is being referenced then it'd a trivial issue at best. Perhaps it might bother someone enough to be bad for them, but that doesn't make it more than a trivial issue in general.
It's certainly nothing like "lagfest" or something that makes the OS unusable or makes the release horrible. Yes it's not perfect, no it's not great, but it's not that far below that, and at worst not below decent.
Now, there are people with actual much more pronounced lag and delays and stutter, and those are actual issues of meaningful consequences--there aren't as many of those, at least in comparison to those with actual issues with 8.0 or 7.0, but there are some.