Mr Right and Mrs Always Right

<Mrs> is a "title of courtesy prefixed to the surname of a married woman" as the OED (lemma: Mrs) tells us. The weakform pronunciation is ... ?
Well, the LPD indicates none nor do the EPD or the ODP. Jack Windsor Lewis in blog 528 lists these weakform variants: /mɪsz̩, mɪss̩/.
What about the strongform (variants)? Here's a quick overview:

			GB pron
EPD18	/ˈmɪs.ɪz/
LDOCE	/ˈmɪsɪz/
LPD3	/ˈmɪsɪz/
OALD8	/ˈmɪsɪz/
Oxf. Dict's online	/ˈmɪsɪz/
OED3	/ˈmɪsᵻz/1

(The recording of "Mrs" on the EPD CD is distorted.)




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 ¹ The symbol /ᵻ/ represents free variation between /ɪ/ and /ə/.