Can't say so. My trips to Mole Jazz (between 1992 and 2000) were always exceptional not only in what I found there but also in the way the staff were helpful and obliging (to the extent possible at all).
Dobell's brings back fond memories to when I was there in 1975 to 1977 during 2-week stays there while still in high school. I found the staff (both in the Jazz and the "Folk" store, one of them must have been Doug Dobell himself) always very helpful and above all patient with the young budding collector that I was, rummaging through the discs for hours on end and ending up with picking 2 or 3 LP's (from my tight 15 to 17 year-old schoolboy budget). I can't have been their best customer, and the questions I asked cannot always have been the most enlightened either (as I was really just getting started) but I was always treated with utter courtesy (OK, maybe ol' man Dobell figured I wasn't that clueless as I literally jumped on that Cyril Davies LP on the Folklore label I discovered there - a Dobell production, as I found out a bit later - and there cannot have been many school kids from abroad buying THAT one ). At any rate, I often wished I'd been able to spend much more there. It was too bad I never made it back to London until 1992, and I remember my disappointment at finding out Dobell's was long gone by then.
Anyway, on record stores in general, what's been said above is what happened here too. Our equivalent of Virgin or Tower used to have good stocks in the jazz and blues departments up until the late 90s but everything has been going downhill fast ever since. Some stores got bigger but "niche" departments got smaller and smaller. Maybe they just figured they needed not bother anymore after another independent local record store that used to stock a lot of major AND minor labels (and had a firm reputation as #1 for all jazz/blues/rock collectors) went belly-up around 2000-2001. Apart from the "Special Jazz Offers" bins in one secondhand record store and the local glance at the local 2001 shop my local record/CD buying in brick-and-mortar shops has virtually stopped years ago. Sadly ....
Nice to be hearing again about Mole - the late joint proprietor, Ed Dipple, was an old friend of mine - and Dobell's, about which the stories were legion; e.g. Roland Kirk leaning on the counter, surrounded by admiring fans, demanding to hear record after record by Fats Waller. Just as the real Londoner, a Cockney, was said to have been born "within the sound of Bow Bells", the true hipster was said to live in a pad "within the sound of Dobell's"; i.e. in the decrepit property called "the buildings" in which the store was located.