"Very ordinary" isn't winning or drawing series though. Surely no one defines "very ordinary" with 1-1 in SA or 1-1 in SL.
That's definitely not what I associate with the term. They won in NZ, WI, drew in SA and drew in SL. They lost in Aust in a closely fought 2-1 series. They lost in Eng badly of course but before that won.
They are far from a great team. Hell you can argue they aren't/weren't a very good team. But they weren't "very ordinary" away from home. Their away record isn't too much worse to England.
Getting seriously into semantics here, but India over the last 5-7 years are a team that have had a number of very good away
series results without actually winning all that many Tests. They've had some good results like drawing away in South Africa, but I think some of the results individually have been fairly average, such as winning only 2 out of 6 Tests against New Zealand and the West Indies. Put together as a whole and it's a good sequence of results in places where India have traditionally found it hard to win, but I don't think "ordinary" is too far off the mark to be honest. Personally I think it's a little better than that, but not by much.
I'd never seek to downplay what the Indian team has achieved in the last 3 years; they were quite clearly the best side in the world at the time and fully deserved their number 1 ranking, but I certainly don't think, even in arguably their best ever period, that they've been all that special away from home.
edit: going back to the last time they were in Australia (which I think covers away series against everyone except Pakistan) India have won 8 out of a possible 25 Tests away from home (6 out of 23 if we don't count Bangladesh), losing 9. That's been good enough for 3 series wins, 2 draws and 3 losses. In the same period, England's away record is P23 W8 D9 L6, for a series record of P7 W3 D1 L3. Faily similar, but England managed to win multiple Tests in New Zealand and Australia, which IMO is
slightly more impressive than India winning single Tests in every series until they came to England.