Why does Adobe Acrobat XI 11.0.07 take 2 minutes to load a Brother Scanner Interface dialog?

Question

Just updated OS X to 10.10 (Yosemite), on a MacBook Pro Retina (i7 processor, 8 GB) today.
Now, after having trouble, so uninstalled & reinstalled Adobe Acrobat Pro XI (11.0.07), I'm further delayed each time I try to scan.
In the past, I've used the menus in Acrobat to scan:  File / Create / PDF from Scanner.
This immediately shows the first of two dialog boxes:  ADOBE SCAN, where I select Brother TWAIN as the input, scan to a new PDF document, no OCR, not PDF/A, not Optimized) and click Scan.
This brings up the second dialog box (BROTHER TWAIN), which sets resolution, color or black / white, and page size.  This second dialog box used to appear right away - now there is always a 2 minute delay, before the 2nd dialog box appears, during which time the system is responsive but Acrobat appears non-responsive.
So, why the 2 minute delay?

Answer 1

I'd like to add that I'm having the exact same issue, which started after the Acrobat 11.0.09 upgrade in Yosemite.  The previous version of Acrobat worked just fine in Yosemite.
I have a Brother ADS-1500W, and the same symptoms as the OP, which are:
I click File > Create PDF from Scanner
I get the Adobe scanner window, where I input my settings.
I click "Scan", then have a 1-2 minute wait before my actually scanner input window comes up.
I'm a creative cloud subscriber, how can I downgrade to 11.0.0?
EDIT: (Temporarily?) Fixed
I saw another brother user report that updating their scanner drivers directly from Brother fixed the issue.  I downloaded the latest printer drivers directly from Brother here, (version 3.10.0, released on 10/23/2014) and the transition from the Adobe to the Brother/OSX scan dialogue is once again instant. Other users have reported that the fix goes away on restart, so I'll see if I can avoid restarting until Adobe/Brother comes up with a more permanent fix.