How long to wait before enacting decisions from Meta?

Question

In general, how long should we wait for community feedback before confirming and enacting decisions on meta? For example, I recently asked whether we should burn a tag and the response was positive, but THelper♦ advised patience:

As a moderator I could already merge the tag, but I'd like to wait a bit to see if there are any people who object to this.

For me personally, having an estimate (at least a rough one) means that I'm more at ease while awaiting community feedback. It also means I'm more likely to revisit the topic later on, and not let it fall into abandon.

Precedent

Tags

• 1 day What the difference between the 'urban' and 'city-living' tags?
• 1 day Merge greywater and graywater tags
• 3 days Should we merge [car] and [cars]?
• 15 days Heating tag is only for space-heating or not?
• 90 days Disambiguation of the toilet tag?

Site Maintenance

• 13 days update the site description
• Never Should we add 'shopping questions and product recommendations' to our Help Center dont-ask list?
• Never Should this site be renamed?
• Never Customising the Help Centre's "What topics can I ask about here?"

Answer 1

If a discussion becomes a hot meta post (gains at least 3 votes) then it would be reasonable to wait until the discussion is no longer featured as a hot meta post (2 weeks later). It seems fair to assume that most feedback will be provided in the hot period. This exact criteria was shared by Shog9:

On sites other than Stack Overflow and sites without per-site metas, if there are still under four items, the rest of the space is filled with hot discussion questions not marked status-completed, scoring at least 3 and posted within the past two weeks. These are picked semi-randomly. (Note that the timing, score and tags can be adjusted per-site to suit the needs of each community).

Of course, this is only a guideline and ultimately it's up to the discretion of the moderators.