The phrase "about as major" is correct and usable in written English.
It can be used to express a comparison of significance or importance, often in a casual or informal context.
Example: "The changes in the policy are about as major as the last overhaul we had."
Alternatives: "just as significant" or "equally important".
Malcolm Griffiths, a consultant obstetrician and gynaecologist who led the development of the guidelines, said: "Caesarean section is a major operation, it's about as major as a hysterectomy.
Following up on the June column about the notable number of major anniversaries Princeton is seeing this year, I spent some quality summer time honoring a different milestone — one that, in the media world, is about as major as they come: It is, almost unbelievably, the 50th anniversary of the release of Stanley Kubrick's 2001: A Space Odyssey.
In urban areas it's usually not a major issue to worry about, as the major cellular carriers cover those areas well.
It's about as grim as major studio film-making can get these days, though Mother's Day (Lionsgate, 12) at least wants in on that conversation.
It's about women as major players in powerful positions".
Seven 'non-users of CAM' were also interviewed and they cited lack of knowledge and information about CAM as major reasons for non-use.
According to critics, about as well, despite a major marketing campaign that includes nightly ads on TV.
A union of the two would defy basic laws of nature, PC World suggests: Microsoft and Apple are about as different as two major players in the same business can be.
The situation was about as he pictured it: the major's office filled with pontoon, the major himself pinned against the wall.
Dysthymia is about as common as major depression.
The harsh bass voice with which he imitated the pope sounded about as cuddly as a sergeant major.
