No it does not. BU does not allow me to vote in a non binding way for 10MB.
This is a very instructive example of a concern-troll's general MO.
Intuitively we all know at face value this statement is totally bogus, because you simply set your acceptance limit to 10MB, and when a block appears that actually has the weight of proof-of-work behind it, your client will automatically go with the program.
The skill here is throwing in the term "non binding way", which is tremendously ambiguous. You spring the troll trap one of two ways:
1) You reply immediately with the obvious intuitive rebuttal, in which case now he pivots "non binding way" to mean whatever it needs to mean to patronize you and label you an idiot, and launch into another fillibuster that creates a handful more of these traps; or
2) You take a more tactful approach and attempt to interrogate what "non binding way" actually means. This elicits a much less superficially antagonistic exchange, but it basically throws a softball at the concern troll to show the trappings of prestige and erudition, again by lecturing you on the basis of concepts that the troll completely made up.
These techniques are very effective for influencing casual lurkers who do not necessarily follow the broad context of any given protracted conversation.