I know this is a rather old thread, but just wanted to add my own comments for others...
I have a 70b (with Honeycomb), and since it has only a single core 1.2GHz CPU it has always been slow (compared to other higher end devices), but...
As for the boot up time, that varies greatly (even on higher end dual-core CPU Android devices) due to several things.
First off, the more apps you install the more it has to sort through when it starts up (because far too many apps want to automatically load on boot... same problem eve with Windows computers by the way).
Second, (and as mentioned), Google's own updates keep adding more and more CRAP that nobody really needs/wants, but yet Google requires absolutely must load on start up.
Third, (and even worse than Google's own CRAP updates) is the app developers themselves that seem to think that THEIR own app absolutely must start up and 'phone home' right away. For example, I had one racing game that would periodically just have to pop up a notifications saying I've left my car in the garage to long and it's starting to rust out... SHEEZE, who the hell wants that kind of crap when you start up your tablet (much less at ANY other time for that matter).
My own suggestions are... check if there is any setting options within an app to TURN OFF any/all stupid unnecessary background features. Likewise, do NOT ever install/use any Widget that you do not absolutely need (Widgets virtually always do things in the background and therefor must load at boot time).
Even if you try to keep things as clean and lean as you can... heck, a 70b (with Honeycomb) still takes almost a minuted and a half to start up (WITHOUT any other extra apps installed). Remember, these things only have a SINGLE CORE CPU, and as such are slow and sluggish (compared to dual-core CPU devices, which also slow down depending what is installed/setup on them... which is why things have now moved to guad-core CPU's and even 2Gig RAM, but that's mostly just so that Google's own CRAP can even load and run).
[HINT: Google does NOT want you to do anything that they do not know about and ONLY WANT YOU to do what THEY WANT YOU TO. Google is getting worse that Apple, and hate to say it even worse than Microsoft. Never liked Apple's ecosystem, and have always hated Microsoft, but come on now... Google's Android is going far above and beyond anything I'm willing to put up with now. Might just have to change to Windows devices shortly... after all, Microsoft already knows everything I've ever done on my computers for the last 20 years... just read any of the EULA's you had to agree to to install/run anything on a Windows computer. I don't see why I should give Google MORE than what I've already given the dirt bag scum at Microsoft already!!!]
Archos 101 G9 8G classic (512M RAM)