Oh okay, so it is possible! I stand corrected.
The same first name - how mean! Triplets have enough comparisons to put up with without all being called Mary, ffs. Also, the bit where Joey says that she wanted to call one Clare but she couldn't think of another decent name starting with C...um, like Constance, for example? Or Cecil?
I have just read the beginning of Goes To It. They get chased by a submarine and not one but two bombers. They aren't hit and it doesn't seem to take that long. However, Jo instantly runs a fever, becomes delirious and winds up 'in a stupor' for 2 days and nights. However, she will be fine if only she casts her babies forthwith. 
Oh, and no one takes her to hospital in all that time. Who looked after her from an, ahem, continence point of view? Frieda and Bill? 
Oh, and she's still carrying 6 month old triplets in a basket. My arms would have fallen off carrying one 6 mo in a basket for more than approximately 4 steps, much less three of them! Also, it must be a simply enormous basket, and all the babies must lie still and not suddenly sit up and try to hurl themselves over the edge, which DD would definitely have done.
And (third inconsistency in about 4 pages), Madge is getting Plas Gwyn ready for Jo. The Round House is described as being only a few doors away. Yet in Highland Twins Daisy has to travel a few miles in the snow to get to Madge to tell her that Jack has been drowned.
I may be nitpicking, but I still love all things EBD. Reading them all in a go like this makes more of these things stand out, but I am nitpicking affectionately!